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Boyes NG, Khan MR, Luchkanych AMS, Marshall RA, Bare I, Haddad T, Abdalla S, Al-Azem IAM, Morse CJ, Zhai A, Haddad H, Marciniuk DD, Olver TD, Tomczak CR. Elevated sympathetic-mediated vasoconstriction at rest but intact functional sympatholysis during exercise in heart failure with reduced ejection fraction. Am J Physiol Heart Circ Physiol 2024; 327:H45-H55. [PMID: 38700474 DOI: 10.1152/ajpheart.00130.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/02/2024] [Accepted: 05/02/2024] [Indexed: 05/05/2024]
Abstract
Patients with heart failure with reduced ejection fraction (HFrEF) have exaggerated sympathoexcitation and impaired peripheral vascular conductance. Evidence demonstrating consequent impaired functional sympatholysis is limited in HFrEF. This study aimed to determine the magnitude of reduced limb vascular conductance during sympathoexcitation and whether functional sympatholysis would abolish such reductions in HFrEF. Twenty patients with HFrEF and 22 age-matched controls performed the cold pressor test (CPT) [left foot 2-min in -0.5 (1)°C water] alone and with right handgrip exercise (EX + CPT). Right forearm vascular conductance (FVC), forearm blood flow (FBF), and mean arterial pressure (MAP) were measured. Patients with HFrEF had greater decreases in %ΔFVC and %ΔFBF during CPT (both P < 0.0001) but not EX + CPT (P = 0.449, P = 0.199) compared with controls, respectively. %ΔFVC and %ΔFBF decreased from CPT to EX + CPT in patients with HFrEF (both P < 0.0001) and controls (P = 0.018, P = 0.015), respectively. MAP increased during CPT and EX + CPT in both groups (all P < 0.0001). MAP was greater in controls than in patients with HFrEF during EX + CPT (P = 0.025) but not CPT (P = 0.209). In conclusion, acute sympathoexcitation caused exaggerated peripheral vasoconstriction and reduced peripheral blood flow in patients with HFrEF. Handgrip exercise abolished sympathoexcitatory-mediated peripheral vasoconstriction and normalized peripheral blood flow in patients with HFrEF. These novel data reveal intact functional sympatholysis in the upper limb and suggest that exercise-mediated, local control of blood flow is preserved when cardiac limitations that are cardinal to HFrEF are evaded with dynamic handgrip exercise.NEW & NOTEWORTHY Patients with HFrEF demonstrate impaired peripheral blood flow regulation, evidenced by heightened peripheral vasoconstriction that reduces limb blood flow in response to physiological sympathoexcitation (cold pressor test). Despite evidence of exaggerated sympathetic vasoconstriction, patients with HFrEF demonstrate a normal hyperemic response to moderate-intensity handgrip exercise. Most importantly, acute, simultaneous handgrip exercise restores normal limb vasomotor control and vascular conductance during acute sympathoexcitation (cold pressor test), suggesting intact functional sympatholysis in patients with HFrEF.
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Affiliation(s)
- Natasha G Boyes
- College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - M Rafique Khan
- College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Adam M S Luchkanych
- College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatchewan, Canada
| | - Rory A Marshall
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatchewan, Canada
| | - Idris Bare
- Division of Cardiology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Tony Haddad
- Division of Cardiology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Sherif Abdalla
- Division of Cardiology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | | | - Cameron J Morse
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatchewan, Canada
| | - Alexander Zhai
- Division of Cardiology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Haissam Haddad
- Division of Cardiology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Darcy D Marciniuk
- Division of Respirology, College of Medicine, University of Saskstchewan, Saskatoon, Saskatchewan, Canada
| | - T Dylan Olver
- Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatchewan, Canada
| | - Corey R Tomczak
- College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Alpenglow JK, Bunsawat K, Francisco MA, Broxterman RM, Craig JC, Iacovelli JJ, Weavil JC, Harrison JD, Morgan DE, Silverton NA, Reese VR, Ma CL, Ryan JJ, Wray DW. α-Adrenergic regulation of skeletal muscle blood flow during exercise in patients with heart failure with preserved ejection fraction. J Physiol 2024; 602:3401-3422. [PMID: 38843407 PMCID: PMC11250769 DOI: 10.1113/jp285526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 04/26/2024] [Indexed: 07/17/2024] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) has been characterized by lower blood flow to exercising limbs and lower peak oxygen utilization (V ̇ O 2 ${{\dot{V}}_{{{{\mathrm{O}}}_{\mathrm{2}}}}}$ ), possibly associated with disease-related changes in sympathetic (α-adrenergic) signaling. Thus, in seven patients with HFpEF (70 ± 6 years, 3 female/4 male) and seven controls (CON) (66 ± 3 years, 3 female/4 male), we examined changes (%Δ) in leg blood flow (LBF, Doppler ultrasound) and legV ̇ O 2 ${{\dot{V}}_{{{{\mathrm{O}}}_{\mathrm{2}}}}}$ to intra-arterial infusion of phentolamine (PHEN, α-adrenergic antagonist) or phenylephrine (PE, α1-adrenergic agonist) at rest and during single-leg knee-extension exercise (0, 5 and 10 W). At rest, the PHEN-induced increase in LBF was not different between groups, but PE-induced reductions in LBF were lower in HFpEF (-16% ± 4% vs. -26% ± 5%, HFpEF vs. CON; P < 0.05). During exercise, the PHEN-induced increase in LBF was greater in HFpEF at 10 W (16% ± 8% vs. 8% ± 5%; P < 0.05). PHEN increased legV ̇ O 2 ${{\dot{V}}_{{{{\mathrm{O}}}_{\mathrm{2}}}}}$ in HFpEF (10% ± 3%, 11% ± 6%, 15% ± 7% at 0, 5 and 10 W; P < 0.05) but not in controls (-1% ± 9%, -4% ± 2%, -1% ± 5%; P = 0.24). The 'magnitude of sympatholysis' (PE-induced %Δ LBF at rest - PE-induced %Δ LBF during exercise) was lower in patients with HFpEF (-6% ± 4%, -6% ± 6%, -7% ± 5% vs. -13% ± 6%, -17% ± 5%, -20% ± 5% at 0, 5 and 10 W; P < 0.05) and was positively related to LBF, leg oxygen delivery, legV ̇ O 2 ${{\dot{V}}_{{{{\mathrm{O}}}_{\mathrm{2}}}}}$ , and the PHEN-induced increase in LBF (P < 0.05). Together, these data indicate that excessive α-adrenergic vasoconstriction restrains blood flow and limitsV ̇ O 2 ${{\dot{V}}_{{{{\mathrm{O}}}_{\mathrm{2}}}}}$ of the exercising leg in patients with HFpEF, and is related to impaired functional sympatholysis in this patient group. KEY POINTS: Sympathetic (α-adrenergic)-mediated vasoconstriction is exaggerated during exercise in patients with heart failure with preserved ejection fraction (HFpEF), which may contribute to limitations of blood flow, oxygen delivery and oxygen utilization in the exercising muscle. The ability to adequately attenuate α1-adrenergic vasoconstriction (i.e. functional sympatholysis) within the vasculature of the exercising muscle is impaired in patients with HFpEF. These observations extend our current understanding of HFpEF pathophysiology by implicating excessive α-adrenergic restraint and impaired functional sympatholysis as important contributors to disease-related impairments in exercising muscle blood flow and oxygen utilization in these patients.
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Affiliation(s)
- Jeremy K. Alpenglow
- Department of Nutrition and Integrative Physiology, University of Utah, SLC, UT
| | - Kanokwan Bunsawat
- Department of Internal Medicine, Division of Geriatrics, University of Utah, SLC, UT
- Geriatric Research, Education, and Clinical Center, VAMC, SLC, UT
| | | | - Ryan M. Broxterman
- Department of Nutrition and Integrative Physiology, University of Utah, SLC, UT
- Department of Internal Medicine, Division of Geriatrics, University of Utah, SLC, UT
- Geriatric Research, Education, and Clinical Center, VAMC, SLC, UT
| | - Jesse C. Craig
- Department of Internal Medicine, Division of Geriatrics, University of Utah, SLC, UT
- Geriatric Research, Education, and Clinical Center, VAMC, SLC, UT
| | - Jarred J. Iacovelli
- Department of Nutrition and Integrative Physiology, University of Utah, SLC, UT
| | - Joshua C. Weavil
- Geriatric Research, Education, and Clinical Center, VAMC, SLC, UT
| | | | | | - Natalie A. Silverton
- Geriatric Research, Education, and Clinical Center, VAMC, SLC, UT
- Department of Anesthesiology, University of Utah, SLC, UT
| | - Van R. Reese
- Department of Internal Medicine, Division of Geriatrics, University of Utah, SLC, UT
| | - Christy L. Ma
- Department of Internal Medicine, Division of Cardiovascular Medicine, SLC, UT
| | - John J. Ryan
- Department of Internal Medicine, Division of Cardiovascular Medicine, SLC, UT
| | - D. Walter Wray
- Department of Nutrition and Integrative Physiology, University of Utah, SLC, UT
- Department of Internal Medicine, Division of Geriatrics, University of Utah, SLC, UT
- Geriatric Research, Education, and Clinical Center, VAMC, SLC, UT
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Kataoka Y, Sales ARK, Rodrigues AG, Goes-Santos BR, Azevedo LF, Groehs RV, Silva EO, Santos LS, Oliveira PA, Jordão CP, Andrade ACM, Lobo DML, Rondon E, Toschi-Dias E, Alves MJNN, Almeida DR, Negrão CE. Abnormal neurovascular control during central and peripheral chemoreceptors stimulation in heart failure patients with preserved ejection fraction. Clin Auton Res 2024; 34:363-374. [PMID: 38878143 DOI: 10.1007/s10286-024-01041-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 05/20/2024] [Indexed: 07/19/2024]
Abstract
PURPOSE Central and peripheral chemoreceptors are hypersensitized in patients with heart failure with reduced ejection fraction. Whether this autonomic alteration occurs in patients with heart failure with preserved ejection fraction (HFpEF) remains little known. We test the hypothesis that the central and peripheral chemoreflex control of muscle sympathetic nerve activity (MSNA) is altered in HFpEF. METHODS Patients aged 55-80 years with symptoms of heart failure, body mass index ≤ 35 kg/m2, left ventricular ejection fraction > 50%, left atrial volume index > 34 mL/m2, left ventricular early diastolic filling velocity and early diastolic tissue velocity of mitral annulus ratio (E/e' index) ≥ 13, and BNP levels > 35 pg/mL were included in the study (HFpEF, n = 9). Patients without heart failure with preserved ejection fraction (non-HFpEF, n = 9), aged-paired, were also included in the study. Peripheral chemoreceptors stimulation (10% O2 and 90% N2, with CO2 titrated) and central chemoreceptors stimulation (7% CO2 and 93% O2) were conducted for 3 min. MSNA was evaluated by microneurography technique, and forearm blood flow (FBF) by venous occlusion plethysmography. RESULTS During hypoxia, MSNA responses were greater (p < 0.001) and FBF responses were lower in patients with HFpEF (p = 0.006). Likewise, MSNA responses during hypercapnia were higher (p < 0.001) and forearm vascular conductance (FVC) levels were lower (p = 0.030) in patients with HFpEF. CONCLUSIONS Peripheral and central chemoreflex controls of MSNA are hypersensitized in patients with HFpEF, which seems to contribute to the increase in MSNA in these patients. In addition, peripheral and central chemoreceptors stimulation in patients with HFpEF causes muscle vasoconstriction.
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Affiliation(s)
- Yufuko Kataoka
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Allan R K Sales
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
- D'Or Institute for Research and Education (IDOR), São Paulo, Brazil
- D'Or Institute for Research and Education (IDOR), Rio de Janeiro, Brazil
| | - Amanda G Rodrigues
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
- Research and Education Institute, Hospital Sirio Libanes, São Paulo, Brazil
| | - Beatriz R Goes-Santos
- School of Physical Education, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Luciene F Azevedo
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Raphaela V Groehs
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Edna O Silva
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Luciana S Santos
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Patricia A Oliveira
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Camila P Jordão
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Ana C M Andrade
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Denise M L Lobo
- Physiotherapy Unit, Fametro University Center (Unifametro), Fortaleza, Ceará, Brazil
| | - Eduardo Rondon
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Edgar Toschi-Dias
- Psychology, Development and Public Policy Program, Catholic University of Santos, São Paulo, Brazil
| | - Maria Janieire N N Alves
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil
| | - Dirceu R Almeida
- Division of Cardiology, Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
| | - Carlos E Negrão
- Faculdade de Medicina, Instituto do Coração (InCor), Hospital das Clínicas HCFMUSP, Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, Cerqueira César, São Paulo, CEP 05403-904, Brazil.
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil.
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Grassi G, Drager LF. Sympathetic overactivity, hypertension and cardiovascular disease: state of the art. Curr Med Res Opin 2024; 40:5-13. [PMID: 38597067 DOI: 10.1080/03007995.2024.2305248] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/10/2024] [Indexed: 04/11/2024]
Abstract
Cardiovascular disease (CVD) remains the most prevalent cause of premature death worldwide. It had been suspected for decades that increased activity of the sympathetic nervous system (SNS) might play a pathogenetic role in the development and progression of hypertension, heart failure (HF) and CVD. The use of microneurographic techniques to directly assess the SNS has allowed this field to advance considerably in recent years. We now have compelling evidence for a key role of sympathetic overactivity in the pathogenesis and progression of hypertension and associated hypertension-mediated organ damage (such as endothelial dysfunction, arterial stiffness and left ventricular hypertrophy), HF (with or without reduced left ventricular ejection fraction). Sympathetic overactivity also drives increased cardiovascular risk in the settings of obesity, metabolic syndrome, chronic kidney disease and obstructive sleep apnoea, among other conditions. Thus, sympathetic overactivity is an important factor that drives patients through the CVD continuum, from the early appearance of cardiovascular risk factors, to impairments of the structure and function of components of the heart and arteries, to established CVD, and ultimately to a life-threatening cardiovascular event. A deeper understanding of the role of sympathetic overactivity in the pathogenesis of CVD and HF will support the optimization of therapeutic interventions for these conditions.
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Affiliation(s)
- Guido Grassi
- Department of Medicine and Surgery, Clinica Medica, University of Milano-Bicocca, Milan, Italy
| | - Luciano F Drager
- Hypertension Unit, Renal Division, University of São Paulo Medical School, Sao Paulo, Brazil
- Hypertension Unit, Heart Institute (InCor), University of Sao Paulo Medical School, Sao Paulo, Brazil
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Takeda R, Hissen SL, Akins JD, Washio T, Hearon CM, MacNamara JP, Sarma S, Levine BD, Fadel PJ, Fu Q. Sympathetic Neural Control at Rest and During the Cold Pressor Test in Patients With Heart Failure With Preserved Ejection Fraction. Hypertension 2024; 81:917-926. [PMID: 38385250 PMCID: PMC10954398 DOI: 10.1161/hypertensionaha.123.21918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 02/06/2024] [Indexed: 02/23/2024]
Abstract
BACKGROUND We tested the hypothesis that patients with heart failure with preserved ejection fraction (HFpEF) would have greater muscle sympathetic nerve activity (MSNA) at rest and sympathetic reactivity during a cold pressor test compared with non-heart failure controls. Further, given the importance of the baroreflex modulation of MSNA in the control of blood pressure (BP), we hypothesized that patients with HFpEF would exhibit a reduced sympathetic baroreflex sensitivity. METHODS Twenty-eight patients with HFpEF and 44 matched controls (mean±SD: 71±8 versus 70±7 years; 9 men/19 women versus 16 men/28 women) were studied. BP, heart rate, and MSNA (microneurography) were measured during 6 to 10 minutes of supine rest and the 2-minute cold pressor test. Spontaneous sympathetic baroreflex sensitivity was assessed during supine rest. RESULTS Patients with HFpEF had higher resting MSNA burst frequency (39±14 versus 31±12 bursts/min; P=0.020) and lower sympathetic baroreflex sensitivity (-2.83±0.76 versus -3.57±1.19 bursts/100 heartbeats/mm Hg; P=0.019) than controls, but burst incidence was not different between groups (56±19 versus 50±20 bursts/100 heartbeats; P=0.179). During the cold pressor test, increases in MSNA indices did not differ between groups (P=0.135-0.998), but patients had a smaller increase in diastolic BP (Δ4±6 versus Δ14±11 mm Hg; P<0.001) compared with controls. CONCLUSIONS Despite augmented resting MSNA burst frequency, burst incidence was not significantly different between groups, and sympathetic baroreflex sensitivity was reduced in patients with HFpEF. Furthermore, patients had preserved sympathetic reactivity but attenuated diastolic BP responses during the cold pressor test. These data suggest that, during physiological stress, sympathetic reactivity is intact, but the peripheral pathway for sympathetic vasoconstriction may be impaired in HFpEF.
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Affiliation(s)
- Ryosuke Takeda
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Sarah L. Hissen
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - John D. Akins
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Takuro Washio
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Christopher M. Hearon
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - James P. MacNamara
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Satyam Sarma
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Benjamin D. Levine
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Paul J. Fadel
- University of Texas at Arlington, Arlington, Texas, USA
| | - Qi Fu
- Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital Dallas
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
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Bunsawat K, Nelson MD, Hearon CM, Wray DW. Exercise intolerance in heart failure with preserved ejection fraction: Causes, consequences and the journey towards a cure. Exp Physiol 2024; 109:502-512. [PMID: 38063130 PMCID: PMC10984794 DOI: 10.1113/ep090674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 11/22/2023] [Indexed: 04/04/2024]
Abstract
Heart failure with preserved ejection fraction (HFpEF) accounts for over 50% of all heart failure cases nationwide and continues to rise in its prevalence. The complex, multi-organ involvement of the HFpEF clinical syndrome requires clinicians and investigators to adopt an integrative approach that considers the contribution of both cardiac and non-cardiac function to HFpEF pathophysiology. Thus, this symposium review outlines the key points from presentations covering the contributions of disease-related changes in cardiac function, arterial stiffness, peripheral vascular function, and oxygen delivery and utilization to exercise tolerance in patients with HFpEF. While many aspects of HFpEF pathophysiology remain poorly understood, there is accumulating evidence for a decline in vascular health in this patient group that may be remediable through pharmacological and lifestyle interventions and could improve outcomes and clinical status in this ever-growing patient population.
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Affiliation(s)
- Kanokwan Bunsawat
- Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah, USA
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah, USA
| | - Michael D Nelson
- Department of Kinesiology, University of Texas at Arlington, Arlington, Texas, USA
| | - Christopher M Hearon
- Department of Applied Clinical Research, The University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - D Walter Wray
- Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah, USA
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA
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7
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Alpenglow JK, Bunsawat K, Francisco MA, Craig JC, Iacovelli JJ, Ryan JJ, Wray DW. Impaired cardiopulmonary baroreflex function and altered cardiovascular responses to hypovolemia in patients with heart failure with preserved ejection fraction. J Appl Physiol (1985) 2024; 136:525-534. [PMID: 38174372 PMCID: PMC11212821 DOI: 10.1152/japplphysiol.00510.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 12/29/2023] [Accepted: 01/02/2024] [Indexed: 01/05/2024] Open
Abstract
Heart failure with preserved ejection fraction (HFpEF) is associated with autonomic dysregulation, which may be related to baroreflex dysfunction. Thus, we tested the hypothesis that cardiac and peripheral vascular responses to baroreflex activation via lower-body negative pressure (LBNP; -10, -20, -30, -40 mmHg) would be diminished in patients with HFpEF (n = 10, 71 ± 7 yr) compared with healthy controls (CON, n = 9, 69 ± 5 yr). Changes in heart rate (HR), mean arterial pressure (MAP, Finapres), forearm blood flow (FBF, ultrasound Doppler), and thoracic impedance (Z) were determined. Mild levels of LBNP (-10 and -20 mmHg) were used to specifically assess the cardiopulmonary baroreflex, whereas responses across the greater levels of LBNP represented an integrated baroreflex response. LBNP significantly increased in HR in CON subjects at -30 and -40 mmHg (+3 ± 3 and +6 ± 5 beats/min, P < 0.01), but was unchanged in patients with HFpEF across all LBNP levels. LBNP provoked progressive peripheral vasoconstriction, as quantified by changes in forearm vascular conductance (FVC), in both groups. However, a marked (40%-60%) attenuation in FVC responses was observed in patients with HFpEF (-6 ± 8, -15 ± 6, -16 ± 5, and -19 ± 7 mL/min/mmHg at -10, -20, -30, and -40 mmHg, respectively) compared with controls (-15 ± 10, -22 ± 6, -25 ± 10, and -28 ± 10 mL/min/mmHg, P < 0.01). MAP was unchanged in both groups. Together, these data provide new evidence for impairments in cardiopulmonary baroreflex function and diminished cardiovascular responsiveness during hypovolemia in patients with HFpEF, which may be an important aspect of the disease-related changes in autonomic cardiovascular control in this patient group.NEW & NOTEWORTHY Data from the current study demonstrate diminished cardiovascular responsiveness during hypovolemia induced by incremental lower-body negative pressure in patients with heart failure with preserved ejection fraction (HFpEF). These diminished responses imply impaired cardiopulmonary baroreflex function and altered autonomic cardiovascular regulation which may represent an important aspect of HFpEF pathophysiology.
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Affiliation(s)
- Jeremy K Alpenglow
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - Kanokwan Bunsawat
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- George E. Wahlen Department of Veterans Affairs Medical Center, Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah, United States
| | - Michael A Francisco
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- George E. Wahlen Department of Veterans Affairs Medical Center, Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah, United States
| | - Jesse C Craig
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- George E. Wahlen Department of Veterans Affairs Medical Center, Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah, United States
| | - Jarred J Iacovelli
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - John J Ryan
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
| | - D Walter Wray
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- George E. Wahlen Department of Veterans Affairs Medical Center, Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah, United States
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Hamaoka T, Leuenberger UA, Drew RC, Murray M, Blaha C, Luck JC, Sinoway LI, Cui J. Glucose metabolism and autonomic function in healthy individuals and patients with type 2 diabetes mellitus at rest and during exercise. Exp Physiol 2024; 109:214-226. [PMID: 38050866 PMCID: PMC10841625 DOI: 10.1113/ep091444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 10/31/2023] [Indexed: 12/07/2023]
Abstract
Autonomic dysfunction is a common complication of type 2 diabetes mellitus (T2DM). However, the character of dysfunction varies in different reports. Differences in measurement methodology and complications might have influenced the inconsistent results. We sought to evaluate comprehensively the relationship between abnormal glucose metabolism and autonomic function at rest and the response to exercise in healthy individuals and T2DM patients. We hypothesized that both sympathetic and parasympathetic indices would decrease with the progression of abnormal glucose metabolism in individuals with few complications related to high sympathetic tone. Twenty healthy individuals and 11 T2DM patients without clinically evident cardiovascular disease other than controlled hypertension were examined. Resting muscle sympathetic nerve activity (MSNA), heart rate variability, spontaneous cardiovagal baroreflex sensitivity (CBRS), sympathetic baroreflex sensitivity and the MSNA response to handgrip exercise were measured. Resting MSNA was lower in patients with T2DM than in healthy control subjects (P = 0.011). Resting MSNA was negatively correlated with haemoglobin A1c in all subjects (R = -0.45, P = 0.024). The parasympathetic components of heart rate variability and CBRS were negatively correlated with glycaemic/insulin indices in all subjects and even in the control group only (all, P < 0.05). In all subjects, the MSNA response to exercise was positively correlated with fasting blood glucose (R = 0.69, P < 0.001). Resting sympathetic activity and parasympathetic modulation of heart rate were decreased in relationship to abnormal glucose metabolism. Meanwhile, the sympathetic responses to handgrip were preserved in diabetics. The responses were correlated with glucose/insulin parameters throughout diabetic and control subjects. These results suggest the importance of a comprehensive assessment of autonomic function in T2DM.
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Affiliation(s)
- Takuto Hamaoka
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
| | - Urs A. Leuenberger
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
| | - Rachel C. Drew
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
- Department of Exercise and Health SciencesUniversity of Massachusetts BostonBostonMassachusettsUSA
| | - Matthew Murray
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
| | - Cheryl Blaha
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
| | - Jonathan Carter Luck
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
| | - Lawrence I. Sinoway
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
| | - Jian Cui
- Penn State Heart and Vascular InstitutePennsylvania State University College of MedicineHersheyPennsylvaniaUSA
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9
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Mamontov OV, Zaytsev VV, Kamshilin AA. Plethysmographic assessment of vasomotor response in patients with congestive heart failure before and after heart transplantation. BIOMEDICAL OPTICS EXPRESS 2024; 15:687-699. [PMID: 38404348 PMCID: PMC10890858 DOI: 10.1364/boe.511925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/22/2023] [Accepted: 12/24/2023] [Indexed: 02/27/2024]
Abstract
Sympathetic vasomotor response is the most important part of the autonomic regulation of circulation, which determines the quality of life. It is disrupted in a number of diseases, particularly in patients with congestive heart failure (CHF). However, experimental evaluation of reflex vasoconstriction is still a non-trivial task due to the limited set of available technologies. The aim of this study is to assess the dynamics of vasomotor response of forearm vessels due to both the deactivation of cardiopulmonary baroreceptors and cold stress using a newly designed imaging plethysmograph (IPG) and compare its performance with classical air plethysmograph (APG). In both vasoconstriction tests, vasomotor response was assessed as a change in the blood flow rate due to venous occlusion compared to that at rest. Both tests were carried out in 45 CHF patients both before and after heart transplantation, as well as in 11 age-matched healthy volunteers. Prior to transplantation, both APG and IPG showed a significant decrease in vasomotor response in CHF patients due to both tests as compared to the control group. After heart transplantation, an increase in vasomotor reactivity was revealed in both vasoconstriction tests. We have found that both plethysmographic techniques provide correlated assessment of changes in the vasomotor response. In addition, we have found that IPG is more resistant to artifacts than APG. The new IPG method has the advantage of measuring blood flow in a contactless manner, making it very promising for experimental evaluation of vasomotor response in clinical conditions.
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Affiliation(s)
- Oleg V. Mamontov
- Laboratory of New Functional Materials for Photonics, Institute of Automation and Control Processes of Far East Branch of the Russian Academy of Sciences, 690041 Vladivostok, Russia
- Department of Circulation Physiology, Almazov National Medical Research Centre, 197341 St. Petersburg, Russia
- Department of Departmental Therapy, Pavlov First Saint Petersburg State Medical University, 197022 St. Petersburg, Russia
| | - Valeriy V. Zaytsev
- Laboratory of New Functional Materials for Photonics, Institute of Automation and Control Processes of Far East Branch of the Russian Academy of Sciences, 690041 Vladivostok, Russia
- Department of Circulation Physiology, Almazov National Medical Research Centre, 197341 St. Petersburg, Russia
| | - Alexei A. Kamshilin
- Laboratory of New Functional Materials for Photonics, Institute of Automation and Control Processes of Far East Branch of the Russian Academy of Sciences, 690041 Vladivostok, Russia
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10
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Elendu C, Amaechi DC, Elendu TC, Fiemotonghan BE, Okoye OK, Agu-Ben CM, Onyekweli SO, Amapu DA, Ikpegbu R, Asekhauno M, Pius E, Bayo-Shodipo AT, Okezie-Okoye CA, Bello N, Oguine C, Edochie P, Dike N, Amos I, Asekhauno J, Wusu-Ejalonibu TM, Ozigi EE, Otobo GO, Olokodana AR, Ayabazu CP, Nwafor RT, Gonji NJ, Akpovona O, Awotoye TI, Ozigis MO, Afolabi O, Alabi OS, Adebayo M. A comprehensive review of heart failure: Unraveling the etiology, decoding pathophysiological mechanisms, navigating diagnostic modalities, exploring pharmacological interventions, advocating lifestyle modifications, and charting the horizon of emerging therapies in the complex landscape of chronic cardiac dysfunction. Medicine (Baltimore) 2024; 103:e36895. [PMID: 38241566 PMCID: PMC10798706 DOI: 10.1097/md.0000000000036895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 12/18/2023] [Indexed: 01/21/2024] Open
Abstract
Heart failure (HF) poses a significant global health burden, necessitating a profound understanding of its multifaceted dimensions. This comprehensive review aims to unravel the etiology, decode pathophysiological mechanisms, navigate diagnostic modalities, explore pharmacological interventions, advocate lifestyle modifications, and chart the horizon of emerging therapies in the complex landscape of chronic cardiac dysfunction. The exploration of HF begins with an insightful journey into its diverse etiological factors, encompassing genetic predispositions, hypertension, and coronary artery disease. Delving into pathophysiological mechanisms, this review elucidates the intricate processes of cardiac remodeling, neurohormonal activation, and cellular dysfunction that underlie the progression of HF. Diagnostic modalities play a pivotal role in unraveling the mysteries of HF by examining advanced imaging techniques, biomarkers, and comprehensive clinical assessments. The pharmacological interventions section provides an in-depth analysis of traditional medications, such as diuretics and angiotensin-converting enzyme inhibitors, while highlighting the emergence of novel drug classes transforming HF management. Advocating lifestyle modifications emphasizes the crucial role of diet, exercise, smoking cessation, and alcohol moderation in enhancing patient outcomes. Lastly, the review delves into the promising horizon of emerging therapies, offering a glimpse into current research, innovative treatment approaches, and potential breakthroughs. As HF management faces challenges in patient compliance, healthcare access, and education, this comprehensive review aims to equip healthcare professionals and researchers with a holistic understanding of chronic cardiac dysfunction's intricacies. In conclusion, synthesizing key findings emphasizes the need for an integrated and multidimensional approach to effectively address the complex landscape of heart failure.
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Affiliation(s)
| | | | | | | | - Osinachi K. Okoye
- Chukwuemeka Odumegwu Ojukwu University Teaching Hospital, Awka, Nigeria
| | | | | | | | | | | | - Erica Pius
- Babcock University, Ilishan-Remo, Nigeria
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Otite Akpovona
- King’s College Hospital NHS Foundation Trust, London, England
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11
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Liu HN, Gao B. Exploration of cardiac rehabilitation nursing for elderly patients with myocardial infarction based on individualized cardiac rehabilitation. World J Clin Cases 2024; 12:256-266. [PMID: 38313651 PMCID: PMC10835703 DOI: 10.12998/wjcc.v12.i2.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/24/2023] [Accepted: 12/25/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND Myocardial infarction is a high-risk condition prevalent among the elderly population, often leading to adverse clinical manifestations such as reduced cardiopulmonary function, anxiety, and depression post-surgery. Consequently, cardiac rehabilitation holds immense importance in mitigating these complications. AIM To evaluate the effect of individualized cardiac rehabilitation on blood pressure variability (BPV) and baroreflex sensitivity (BRS) in elderly patients with myocardial infarction. METHODS A cohort of 74 elderly patients diagnosed with myocardial infarction and admitted to our hospital between January 2021 and January 2022 were subjected to random selection. Subsequently, all patients were divided into two groups, namely the research group (n = 37) and the control group (n = 37), utilizing the number table method. The control group received conventional drug treatment and nursing guidance intervention, while the study group underwent individualized cardiac rehabilitation in addition to the interventions received by the control group. All patients were continuously intervened for 12 wk, and the BPV of these two groups in the 1st wk (T0), the 4th wk (T1) and the 12th wk (T2) were compared, BRS, changes in cardiopulmonary function measures, and adverse cardiovascular events. RESULTS Of 24 h diastolic BPV, 24 h systolic BPV, carbon dioxide ventilation equivalent slope of the research group were lower than those of the control group at T1 and T2, BRS, peak heart rate and systolic blood pressure product, 1 min heart rate recovery were higher than those of the control group, and the incidence of adverse events in the research group was lower than that of the control group, the difference was statistically significant (P < 0.05). CONCLUSION In this study, we found that after individualized cardiac rehabilitation in elderly patients with myocardial infarction, BPV and BRS can be effectively improved, cardiac function is significantly enhanced, and a better prognosis is obtained.
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Affiliation(s)
- Hua-Ning Liu
- Department of Geriatrics, General Hospital of the YangTze River Shipping, Wuhan Brain Hospital, Wuhan 430015, Hubei Province, China
| | - Bo Gao
- Department of Cardiology, Suizhou Central Hospital, Affiliated Hospital of Hubei University of Medicine, Suizhou 441300, Hubei Province, China
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12
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Bunsawat K, Skow RJ, Kaur J, Wray DW. Neural control of the circulation during exercise in heart failure with reduced and preserved ejection fraction. Am J Physiol Heart Circ Physiol 2023; 325:H998-H1011. [PMID: 37682236 PMCID: PMC10907034 DOI: 10.1152/ajpheart.00214.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 08/23/2023] [Accepted: 09/06/2023] [Indexed: 09/09/2023]
Abstract
Patients with heart failure with reduced (HFrEF) and preserved ejection fraction (HFpEF) exhibit severe exercise intolerance that may be due, in part, to inappropriate cardiovascular and hemodynamic adjustments to exercise. Several neural mechanisms and locally released vasoactive substances work in concert through complex interactions to ensure proper adjustments to meet the metabolic demands of the contracting skeletal muscle. Specifically, accumulating evidence suggests that disease-related alterations in neural mechanisms (e.g., central command, exercise pressor reflex, arterial baroreflex, and cardiopulmonary baroreflex) contribute to heightened sympathetic activation and impaired ability to attenuate sympathetic vasoconstrictor responsiveness that may contribute to reduced skeletal muscle blood flow and severe exercise intolerance in patients with HFrEF. In contrast, little is known regarding these important aspects of physiology in patients with HFpEF, though emerging data reveal heightened sympathetic activation and attenuated skeletal muscle blood flow during exercise in this patient population that may be attributable to dysregulated neural control of the circulation. The overall goal of this review is to provide a brief overview of the current understanding of disease-related alterations in the integrative neural cardiovascular responses to exercise in both HFrEF and HFpEF phenotypes, with a focus on sympathetic nervous system regulation during exercise.
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Affiliation(s)
- Kanokwan Bunsawat
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah, United States
| | - Rachel J Skow
- Department of Kinesiology, The University of Texas at Arlington, Arlington, Texas, United States
- Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada
| | - Jasdeep Kaur
- Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, Texas, United States
| | - D Walter Wray
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, Utah, United States
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
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13
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Triposkiadis F, Briasoulis A, Sarafidis P, Magouliotis D, Athanasiou T, Paraskevaidis I, Skoularigis J, Xanthopoulos A. The Sympathetic Nervous System in Hypertensive Heart Failure with Preserved LVEF. J Clin Med 2023; 12:6486. [PMID: 37892623 PMCID: PMC10607346 DOI: 10.3390/jcm12206486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/09/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
The neurohormonal model of heart failure (HF) pathogenesis states that a reduction in cardiac output caused by cardiac injury results in sympathetic nervous system (SNS) activation, that is adaptive in the short-term and maladaptive in the long-term. This model has proved extremely valid and has been applied in HF with a reduced left ventricular (LV) ejection fraction (LVEF). In contrast, it has been undermined in HF with preserved LVEF (HFpEF), which is due to hypertension (HTN) in the vast majority of the cases. Erroneously, HTN, which is the leading cause of cardiovascular disease and premature death worldwide and is present in more than 90% of HF patients, is tightly linked with SNS overactivity. In this paper we provide a contemporary overview of the contribution of SNS overactivity to the development and progression of hypertensive HF (HHF) as well as the clinical implications resulting from therapeutic interventions modifying SNS activity. Throughout the manuscript the terms HHF with preserved LVEF and HfpEF will be used interchangeably, considering that the findings in most HFpEF studies are driven by HTN.
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Affiliation(s)
| | - Alexandros Briasoulis
- Department of Therapeutics, Heart Failure and Cardio-Oncology Clinic, National and Kapodistrian University of Athens, 115 27 Athens, Greece;
| | - Pantelis Sarafidis
- Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece;
| | - Dimitrios Magouliotis
- Unit of Quality Improvement, Department of Cardiothoracic Surgery, University of Thessaly, 411 10 Biopolis, Greece;
| | - Thanos Athanasiou
- Department of Surgery and Cancer, Imperial College London, St Mary’s Hospital, London W2 1NY, UK;
| | | | - John Skoularigis
- Department of Cardiology, University Hospital of Larissa, 411 10 Larissa, Greece;
| | - Andrew Xanthopoulos
- Department of Cardiology, University Hospital of Larissa, 411 10 Larissa, Greece;
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14
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Alpenglow JK, Bunsawat K, Francisco MA, Craig JC, Iacovelli JJ, Ryan JJ, Wray DW. Evidence of impaired functional sympatholysis in patients with heart failure with preserved ejection fraction. Am J Physiol Heart Circ Physiol 2023; 325:H806-H813. [PMID: 37566111 PMCID: PMC10659321 DOI: 10.1152/ajpheart.00450.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/05/2023] [Accepted: 08/10/2023] [Indexed: 08/12/2023]
Abstract
Exercising muscle blood flow is reduced in patients with heart failure with a preserved ejection fraction (HFpEF), which may be related to disease-related changes in the ability to overcome sympathetic nervous system (SNS)-mediated vasoconstriction during exercise, (i.e., "functional sympatholysis"). Thus, in 12 patients with HFpEF (69 ± 7 yr) and 11 healthy controls (Con, 69 ± 4 yr), we examined forearm blood flow (FBF), mean arterial pressure (MAP), and forearm vascular conductance (FVC) during rhythmic handgrip exercise (HG) at 30% of maximum voluntary contraction with or without lower-body negative pressure (LBNP, -20 mmHg) to increase SNS activity and elicit peripheral vasoconstriction. SNS-mediated vasoconstrictor responses were determined as LBNP-induced changes (%Δ) in FVC, and the "magnitude of sympatholysis" was calculated as the difference between responses at rest and during exercise. At rest, the LBNP-induced change in FVC was significantly lesser in HFpEF compared with Con (HFpEF: -9.5 ± 5.5 vs. Con: -21.0 ± 8.0%; P < 0.01). During exercise, LBNP-induced %ΔFVC was significantly attenuated in Con compared with rest (HG: -5.8 ± 6.0%; P < 0.05) but not in HFpEF (HG: -9.9 ± 2.5%; P = 0.88). Thus, the magnitude of sympatholysis was lesser in HFpEF compared with Con (HFpEF: 0.4 ± 4.7 vs. Con: -15.2 ± 11.8%; P < 0.01). These data demonstrate a diminished ability to attenuate SNS-mediated vasoconstriction in HFpEF and provide new evidence suggesting impaired functional sympatholysis in this patient group.NEW & NOTEWORTHY Data from the current study suggest that functional sympatholysis, or the ability to adequately attenuate sympathetic nervous system (SNS)-mediated vasoconstriction during exercise, is impaired in patients with heart failure with preserved ejection fraction (HFpEF). These observations extend the current understanding of HFpEF pathophysiology by implicating inadequate functional sympatholysis as an important contributor to reduced exercising muscle blood flow in this patient group.
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Affiliation(s)
- Jeremy K Alpenglow
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - Kanokwan Bunsawat
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- Geriatric Research, Education, and Clinical Center, Veterans Affairs Medical Center, Salt Lake City, Utah, United States
| | - Michael A Francisco
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- Geriatric Research, Education, and Clinical Center, Veterans Affairs Medical Center, Salt Lake City, Utah, United States
| | - Jesse C Craig
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- Geriatric Research, Education, and Clinical Center, Veterans Affairs Medical Center, Salt Lake City, Utah, United States
| | - Jarred J Iacovelli
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - John J Ryan
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
| | - D Walter Wray
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
- Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, United States
- Geriatric Research, Education, and Clinical Center, Veterans Affairs Medical Center, Salt Lake City, Utah, United States
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15
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Hamaoka T, Leuenberger UA, Kronfli A, Gao Z, Blaha C, Luck JC, Dalton P, Sinoway LI, Cui J. Effect of Cyclooxygenase Inhibition on Peripheral Venous Distension Reflex in Healthy Humans. Hypertension 2023; 80:1102-1109. [PMID: 36942572 PMCID: PMC10133193 DOI: 10.1161/hypertensionaha.122.20506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 03/07/2023] [Indexed: 03/23/2023]
Abstract
BACKGROUND Peripheral venous distension evokes a pressor reflex (venous distension reflex). Afferent group III and IV nerves innervating veins are suggested as the afferent arm of the venous distension reflex. Prostaglandins stimulate/sensitize group III/IV nerves. We hypothesized that inhibition of prostaglandin synthesis by local cyclooxygenase blockade would attenuate the muscle sympathetic nerve activity (MSNA) and blood pressure responses to venous distension. METHODS Nineteen healthy volunteers (age, 27±5 years) participated in the study with 2 visits. To induce venous distension, a volume of solution (saline alone or 9 mg ketorolac tromethamine in saline) was infused into the vein in the antecubital fossa of an arterially occluded forearm. During the procedure, beat-by-beat heart rate, blood pressure and MSNA were recorded simultaneously. The vein size was measured with ultrasound. RESULTS In both visits, the venous distension procedure significantly increased blood pressure, heart rate, and MSNA (all, P<0.05). The increase in mean arterial pressure and MSNA in the ketorolac visit was significantly lower than in the control visit (∆ mean arterial pressure, 7.0±6.2 versus 13.8±7.7 mm Hg; ∆MSNA, 6.0±7.1 versus 14.8±7.7 bursts/min; both, P<0.05). The increase in vein size induced by the infusion was not different between visits. CONCLUSIONS The presented data show that cyclooxygenase blockade attenuates the responses in MSNA and blood pressure to peripheral venous distension reflex. The results suggest that cyclooxygenase products play a key role in evoking afferent activation responsible for the venous distension reflex.
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Affiliation(s)
- Takuto Hamaoka
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Urs A. Leuenberger
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Anthony Kronfli
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Zhaohui Gao
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Cheryl Blaha
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Jonathan Carter Luck
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Paul Dalton
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Lawrence I. Sinoway
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
| | - Jian Cui
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033
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16
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Saleem S, Khandoker AH, Alkhodari M, Hadjileontiadis LJ, Jelinek HF. Investigating the effects of beta-blockers on circadian heart rhythm using heart rate variability in ischemic heart disease with preserved ejection fraction. Sci Rep 2023; 13:5828. [PMID: 37037871 PMCID: PMC10086029 DOI: 10.1038/s41598-023-32963-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/05/2023] [Indexed: 04/12/2023] Open
Abstract
Heart failure is characterized by sympathetic activation and parasympathetic withdrawal leading to an abnormal autonomic modulation. Beta-blockers (BB) inhibit overstimulation of the sympathetic system and are indicated in heart failure patients with reduced ejection fraction. However, the effect of beta-blocker therapy on heart failure with preserved ejection fraction (HFpEF) is unclear. ECGs of 73 patients with HFpEF > 55% were recruited. There were 56 patients in the BB group and 17 patients in the without BB (NBB) group. The HRV analysis was performed for the 24-h period using a window size of 1,4 and 8-h. HRV measures between day and night for both the groups were also compared. Percentage change in the BB group relative to the NBB group was used as a measure of difference. RMSSD (13.27%), pNN50 (2.44%), HF power (44.25%) and LF power (13.53%) showed an increase in the BB group relative to the NBB group during the day and were statistically significant between the two groups for periods associated with high cardiac risk during the morning hours. LF:HF ratio showed a decrease of 3.59% during the day. The relative increase in vagal modulated RMSSD, pNN50 and HF power with a decrease in LF:HF ratio show an improvement in the parasympathetic tone and an overall decreased risk of a cardiac event especially during the morning hours that is characterized by a sympathetic surge.
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Affiliation(s)
- Shiza Saleem
- Department of Biomedical Engineering, Khalifa University, 127788, Abu Dhabi, United Arab Emirates.
| | - Ahsan H Khandoker
- Department of Biomedical Engineering, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
- Healthcare Engineering Innovation Center, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
| | - Mohanad Alkhodari
- Healthcare Engineering Innovation Center, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
- Cardiovascular Clinical Research Facility, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Leontios J Hadjileontiadis
- Department of Biomedical Engineering, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
- Healthcare Engineering Innovation Center, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
| | - Herbert F Jelinek
- Department of Biomedical Engineering, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
- Healthcare Engineering Innovation Center, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
- Biotechnology Center, Khalifa University, 127788, Abu Dhabi, United Arab Emirates
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17
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Manabe K, D’Souza AW, Washio T, Takeda R, Hissen SL, Akins JD, Fu Q. Sympathetic and hemodynamic responses to exercise in heart failure with preserved ejection fraction. Front Cardiovasc Med 2023; 10:1148324. [PMID: 37139124 PMCID: PMC10150451 DOI: 10.3389/fcvm.2023.1148324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/27/2023] [Indexed: 05/05/2023] Open
Abstract
Excessive sympathetic activity during exercise causes heightened peripheral vasoconstriction, which can reduce oxygen delivery to active muscles, resulting in exercise intolerance. Although both patients suffering from heart failure with preserved and reduced ejection fraction (HFpEF and HFrEF, respectively) exhibit reduced exercise capacity, accumulating evidence suggests that the underlying pathophysiology may be different between these two conditions. Unlike HFrEF, which is characterized by cardiac dysfunction with lower peak oxygen uptake, exercise intolerance in HFpEF appears to be predominantly attributed to peripheral limitations involving inadequate vasoconstriction rather than cardiac limitations. However, the relationship between systemic hemodynamics and the sympathetic neural response during exercise in HFpEF is less clear. This mini review summarizes the current knowledge on the sympathetic (i.e., muscle sympathetic nerve activity, plasma norepinephrine concentration) and hemodynamic (i.e., blood pressure, limb blood flow) responses to dynamic and static exercise in HFpEF compared to HFrEF, as well as non-HF controls. We also discuss the potential of a relationship between sympathetic over-activation and vasoconstriction leading to exercise intolerance in HFpEF. The limited body of literature indicates that higher peripheral vascular resistance, perhaps secondary to excessive sympathetically mediated vasoconstrictor discharge compared to non-HF and HFrEF, drives exercise in HFpEF. Excessive vasoconstriction also may primarily account for over elevations in blood pressure and concomitant limitations in skeletal muscle blood flow during dynamic exercise, resulting in exercise intolerance. Conversely, during static exercise, HFpEF exhibit relatively normal sympathetic neural reactivity compared to non-HF, suggesting that other mechanisms beyond sympathetic vasoconstriction dictate exercise intolerance in HFpEF.
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Affiliation(s)
- Kazumasa Manabe
- Women’s Heart Health Laboratory, Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital, Dallas, TX, United States
- Cardiology Division, Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Andrew W. D’Souza
- Women’s Heart Health Laboratory, Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital, Dallas, TX, United States
- Cardiology Division, Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, United States
- Neurovascular Research Laboratory, School of Kinesiology, Western University, London, ON, Canada
| | - Takuro Washio
- Women’s Heart Health Laboratory, Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital, Dallas, TX, United States
- Cardiology Division, Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Ryosuke Takeda
- Women’s Heart Health Laboratory, Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital, Dallas, TX, United States
- Cardiology Division, Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Sarah L. Hissen
- Women’s Heart Health Laboratory, Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital, Dallas, TX, United States
- Cardiology Division, Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - John D. Akins
- Women’s Heart Health Laboratory, Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital, Dallas, TX, United States
- Cardiology Division, Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Qi Fu
- Women’s Heart Health Laboratory, Institute for Exercise and Environmental Medicine at Texas Health Presbyterian Hospital, Dallas, TX, United States
- Cardiology Division, Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, United States
- Correspondence: Qi Fu
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18
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Relationships among norepinephrine levels, exercise capacity, and chronotropic responses in heart failure patients. Heart Fail Rev 2023; 28:35-45. [PMID: 35325323 DOI: 10.1007/s10741-022-10232-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/15/2022] [Indexed: 02/07/2023]
Abstract
In heart failure (HF) patients, the pathophysiological mechanisms of severe exercise intolerance and impaired exercise capacity are related to both central and peripheral abnormalities. The central abnormalities in HF patients include impaired cardiac function and chronotropic incompetence (CI). Indeed, CI, the inability to adequately increase heart rate (HR) from rest to exercise often exhibited by HF patients, is related to activation of the sympathetic nervous system (SNS) yielding a rise in circulating norepinephrine (NE). CI may result from downregulation of β-adrenergic receptors, β-blocker usage, high baseline HR, or due to a combination of factors. This paper discusses the role of elevated NE in altering chronotropic responses in HF patients and consequently resulting in impaired exercise capacity. We suggest that future research should focus on the potential treatment of CI with rate-adaptive pacing, using a sensor to measure physical activity, without inducing deleterious hormonal activation of the sympathetic system.
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Guan Z, Yuan W, Jia J, Zhang C, Zhu J, Huang J, Zhang W, Fan D, Leng H, Li Z, Xu Y, Song C. Bone mass loss in chronic heart failure is associated with sympathetic nerve activation. Bone 2023; 166:116596. [PMID: 36307018 DOI: 10.1016/j.bone.2022.116596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 10/02/2022] [Accepted: 10/18/2022] [Indexed: 11/07/2022]
Abstract
PURPOSE Chronic heart failure causes osteoporosis, but the mechanism remains unclear. The sympathetic nerve plays an important role in both bone metabolism and cardiovascular function. METHODS Thirty-six adult male SD rats were randomly divided into the following four groups: sham surgery (Sham) group, guanethidine (GD) group, abdominal transverse aorta coarctation-induced heart failure + normal saline (TAC) group, and TAC + guanethidine (TAC + GD) group. Normal saline (0.9 % NaCl) or guanethidine (40 mg/kg/ml) was intraperitoneally injected daily for 5 weeks. Then, DXA, micro-CT, ELISA and RT-PCR analyses were performed 12 weeks after treatment. RESULTS The bone loss in rats subjected to TAC-induced chronic heart failure and chemical sympathectomy with guanethidine was increased. Serum norepinephrine levels were increased in rats with TAC-induced heart failure but were decreased in TAC-induced heart failure rats treated with guanethidine. The expression of α2A adrenergic receptor, α2C adrenergic receptor, osteoprotegerin (OPG), and osteocalcin in the tibia decreased in the TAC-induced heart failure group, and the expression of β1 adrenergic receptor, β2 adrenergic receptor, receptor activator of nuclear factor-κ B ligand (RANKL), and RANKL/OPG in the tibia increased in the heart failure group. In addition, these changes in gene expression levels were rescued by chemical sympathectomy with guanethidine. CONCLUSIONS TAC-induced chronic heart failure is associated with bone mass loss, and the sympathetic nerve plays a significant role in heart failure-related bone mass loss. MINI ABSTRACT The present study supports the hypothesis that heart failure is related to bone loss, and the excessive activation of sympathetic nerves participates in this pathophysiological process. The present study suggests a potential pathological mechanism of osteoporosis associated with heart failure and new perspectives for developing strategies for heart failure-related bone loss.
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Affiliation(s)
- Zhiyuan Guan
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
| | - Wanqiong Yuan
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
| | - Jialin Jia
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
| | - Chenggui Zhang
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
| | - Junxiong Zhu
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
| | - Jie Huang
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
| | - Wang Zhang
- Department of Orthopedics, Peking University Third Hospital, Beijing, China
| | - Dongwei Fan
- Department of Orthopedics, Peking University Third Hospital, Beijing, China; Beijing Key Laboratory of Spinal Diseases, Beijing, China
| | - Huijie Leng
- Department of Orthopedics, Peking University Third Hospital, Beijing, China; Beijing Key Laboratory of Spinal Diseases, Beijing, China
| | - Zijian Li
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Beijing 100191, China
| | - Yingsheng Xu
- Department of Neurology, Peking University Third Hospital, Beijing 100191, China
| | - Chunli Song
- Department of Orthopedics, Peking University Third Hospital, Beijing, China; Beijing Key Laboratory of Spinal Diseases, Beijing, China.
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20
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Hammer SM, Bruhn EJ, Bissen TG, Muer JD, Villarraga N, Borlaug BA, Olson TP, Smith JR. Inspiratory and leg muscle blood flows during inspiratory muscle metaboreflex activation in heart failure with preserved ejection fraction. J Appl Physiol (1985) 2022; 133:1202-1211. [PMID: 36227167 PMCID: PMC9639766 DOI: 10.1152/japplphysiol.00141.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 09/29/2022] [Accepted: 10/07/2022] [Indexed: 11/22/2022] Open
Abstract
The purpose of this study was to determine the cardiovascular consequences elicited by activation of the inspiratory muscle metaboreflex in patients with heart failure with preserved ejection fraction (HFpEF) and controls. Patients with HFpEF (n = 15; 69 ± 10 yr; 33 ± 4 kg/m2) and controls (n = 14; 70 ± 8 yr; 28 ± 4 kg/m2) performed an inspiratory loading trial at 60% maximal inspiratory pressure (PIMAX) until task failure. Mean arterial pressure (MAP) was measured continuously. Near-infrared spectroscopy and bolus injections of indocyanine green dye were used to determine the percent change in blood flow index (%ΔBFI) from baseline to the final minute of inspiratory loading in the vastus lateralis and sternocleidomastoid muscles. Vascular resistance index (VRI) was calculated. Time to task failure was shorter in HFpEF than in controls (339 ± 197 s vs. 626 ± 403 s; P = 0.02). Compared with controls, patients with HFpEF had a greater increase from baseline in MAP (16 ± 7 vs. 10 ± 6 mmHg) and vastus lateralis VRI (76 ± 45 vs. 32 ± 19%) as well as a greater decrease in vastus lateralis %ΔBFI (-32 ± 14 vs. -17 ± 9%) (all, P < 0.05). Sternocleidomastoid %ΔBFI normalized to absolute inspiratory pressure was higher in HFpEF compared with controls (8.0 ± 5.0 vs. 4.0 ± 1.9% per cmH2O·s; P = 0.03). These data indicate that patients with HFpEF exhibit exaggerated cardiovascular responses with inspiratory muscle metaboreflex activation compared with controls.NEW & NOTEWORTHY Respiratory muscle dysfunction is thought to contribute to exercise intolerance in heart failure with preserved ejection fraction (HFpEF); however, the underlying mechanisms are unknown. In the present study, patients with HFpEF had greater increases in leg muscle vascular resistance index and greater decreases in leg muscle blood flow index compared with controls during inspiratory resistive breathing (to activate the metaboreflex). Furthermore, respiratory muscle blood flow index responses normalized to pressure generation during inspiratory resistive breathing were exaggerated in HFpEF compared with controls.
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Affiliation(s)
- Shane M Hammer
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
- School of Kinesiology, Applied Health and Recreation, Oklahoma State University, Stillwater, Oklahoma
| | - Eric J Bruhn
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
| | - Thomas G Bissen
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
| | - Jessica D Muer
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
| | - Nicolas Villarraga
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
| | - Barry A Borlaug
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
| | - Thomas P Olson
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
| | - Joshua R Smith
- Department of Cardiovascular Medicine, https://ror.org/03zzw1w08Mayo Clinic, Rochester, Minnesota
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21
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Clemmer JS, Pruett WA. Modeling the physiological roles of the heart and kidney in heart failure with preserved ejection fraction during baroreflex activation therapy. Am J Physiol Heart Circ Physiol 2022; 323:H597-H607. [PMID: 35984764 PMCID: PMC9467477 DOI: 10.1152/ajpheart.00329.2022] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/10/2022] [Accepted: 08/10/2022] [Indexed: 11/22/2022]
Abstract
Heart failure (HF) is a leading cause of death and is increasing in prevalence. Unfortunately, therapies that have been efficacious in patients with HF with reduced ejection fraction (HFrEF) have not convincingly shown a reduction in cardiovascular mortality in patients with HF with preserved ejection fraction (HFpEF). It is thought that high sympathetic nerve activity (SNA) in the heart plays a role in HF progression. Clinical trials demonstrate that baroreflex activation therapy reduces left ventricular (LV) mass and blood pressure (BP) in patients with HFpEF and hypertension; however, the mechanisms are unclear. In the present study, we used HumMod, a large physiology model to simulate HFpEF and predict the time-dependent changes in systemic and cardiac hemodynamics, SNA, and cardiac stresses during baroreflex activation. The baseline HFpEF model was associated with elevations in systolic BP, diastolic dysfunction, and LV hypertrophy and stiffness similar to clinical HFpEF. Simulating 12 mo of baroreflex activation resulted in reduced systolic BP (-25 mmHg) and LV mass (-15%) similar to clinical evidence. Baroreflex activation also resulted in sustained decreases in cardiac and renal SNA (-22%) and improvement in LV β1-adrenergic function. However, the baroreflex-induced reductions in BP and improvements in cardiac stresses, mass, and function were mostly attenuated when renal SNA was clamped at baseline levels. These simulations suggest that the suppression of renal SNA could be a primary determinant of the cardioprotective effects from baroreflex activation in HFpEF.NEW & NOTEWORTHY Treatments that are efficacious in patients with HFrEF have not shown a significant impact on cardiovascular mortality in patients with HFpEF. We believe these simulations offer novel insight into the important roles of the cardiac and renal nerves in HFpEF and the potential mechanisms of how baroreflex activation alleviates HFpEF disease progression.
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Affiliation(s)
- John S Clemmer
- Department of Physiology and Biophysics, Center for Computational Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - W Andrew Pruett
- Department of Physiology and Biophysics, Center for Computational Medicine, University of Mississippi Medical Center, Jackson, Mississippi
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22
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Hamaoka T, Leuenberger UA, Blaha C, Luck JC, Sinoway LI, Cui J. Baroreflex responses to limb venous distension in humans. Am J Physiol Regul Integr Comp Physiol 2022; 323:R267-R276. [PMID: 35726869 PMCID: PMC9359652 DOI: 10.1152/ajpregu.00028.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The venous distension reflex (VDR) is a pressor response evoked by peripheral venous distension and accompanied by increased muscle sympathetic nerve activity (MSNA). The effects of venous distension on the baroreflex, an important modulator of blood pressure (BP), has not been examined. The purpose of this study was to examine the effect of the VDR on baroreflex sensitivity (BRS). We hypothesized that the VDR will increase the sympathetic BRS (SBRS). Beat-by-beat heart rate (HR), BP and MSNA were recorded in 16 female and 19 male young healthy subjects. To induce venous distension, normal saline equivalent to 5% of the forearm volume was infused into the veins of the occluded forearm. SBRS was assessed from the relationship between diastolic BP and MSNA during spontaneous BP variations. Cardiovagal BRS (CBRS) was assessed with the sequence technique. Venous distension evoked significant increases in BP and MSNA. Compared to baseline, during the maximal VDR response period, SBRS was significantly increased (-3.1 ± 1.5 to -4.5 ± 1.6 bursts・100 heartbeat-1・mmHg-1, P < 0.01) and CBRS was significantly decreased (16.6 ± 5.4 to 13.8 ± 6.1 ms・mmHg-1, P < 0.01). No sex differences were observed in the effect of the VDR on SBRS or CBRS. These results indicate that in addition to its pressor effect, the VDR altered both SBRS and CBRS. We speculate that these changes in baroreflex function contribute to the modulation of MSNA and BP during limb venous distension.
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Affiliation(s)
- Takuto Hamaoka
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Urs A Leuenberger
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Cheryl Blaha
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Jonathan Carter Luck
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Lawrence I Sinoway
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Jian Cui
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
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23
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Mehra R, Tjurmina OA, Ajijola OA, Arora R, Bolser DC, Chapleau MW, Chen PS, Clancy CE, Delisle BP, Gold MR, Goldberger JJ, Goldstein DS, Habecker BA, Handoko ML, Harvey R, Hummel JP, Hund T, Meyer C, Redline S, Ripplinger CM, Simon MA, Somers VK, Stavrakis S, Taylor-Clark T, Undem BJ, Verrier RL, Zucker IH, Sopko G, Shivkumar K. Research Opportunities in Autonomic Neural Mechanisms of Cardiopulmonary Regulation: A Report From the National Heart, Lung, and Blood Institute and the National Institutes of Health Office of the Director Workshop. JACC Basic Transl Sci 2022; 7:265-293. [PMID: 35411324 PMCID: PMC8993767 DOI: 10.1016/j.jacbts.2021.11.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 12/22/2022]
Abstract
This virtual workshop was convened by the National Heart, Lung, and Blood Institute, in partnership with the Office of Strategic Coordination of the Office of the National Institutes of Health Director, and held September 2 to 3, 2020. The intent was to assemble a multidisciplinary group of experts in basic, translational, and clinical research in neuroscience and cardiopulmonary disorders to identify knowledge gaps, guide future research efforts, and foster multidisciplinary collaborations pertaining to autonomic neural mechanisms of cardiopulmonary regulation. The group critically evaluated the current state of knowledge of the roles that the autonomic nervous system plays in regulation of cardiopulmonary function in health and in pathophysiology of arrhythmias, heart failure, sleep and circadian dysfunction, and breathing disorders. Opportunities to leverage the Common Fund's SPARC (Stimulating Peripheral Activity to Relieve Conditions) program were characterized as related to nonpharmacologic neuromodulation and device-based therapies. Common themes discussed include knowledge gaps, research priorities, and approaches to develop novel predictive markers of autonomic dysfunction. Approaches to precisely target neural pathophysiological mechanisms to herald new therapies for arrhythmias, heart failure, sleep and circadian rhythm physiology, and breathing disorders were also detailed.
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Key Words
- ACE, angiotensin-converting enzyme
- AD, autonomic dysregulation
- AF, atrial fibrillation
- ANS, autonomic nervous system
- Ach, acetylcholine
- CNS, central nervous system
- COPD, chronic obstructive pulmonary disease
- CSA, central sleep apnea
- CVD, cardiovascular disease
- ECG, electrocardiogram
- EV, extracellular vesicle
- GP, ganglionated plexi
- HF, heart failure
- HFpEF, heart failure with preserved ejection fraction
- HFrEF, heart failure with reduced ejection fraction
- HRV, heart rate variability
- LQT, long QT
- MI, myocardial infarction
- NE, norepinephrine
- NHLBI, National Heart, Lung, and Blood Institute
- NPY, neuropeptide Y
- NREM, non-rapid eye movement
- OSA, obstructive sleep apnea
- PAH, pulmonary arterial hypertension
- PV, pulmonary vein
- REM, rapid eye movement
- RV, right ventricular
- SCD, sudden cardiac death
- SDB, sleep disordered breathing
- SNA, sympathetic nerve activity
- SNSA, sympathetic nervous system activity
- TLD, targeted lung denervation
- asthma
- atrial fibrillation
- autonomic nervous system
- cardiopulmonary
- chronic obstructive pulmonary disease
- circadian
- heart failure
- pulmonary arterial hypertension
- sleep apnea
- ventricular arrhythmia
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Affiliation(s)
- Reena Mehra
- Cleveland Clinic, Cleveland, Ohio, USA
- Case Western Reserve University, Cleveland, Ohio, USA
| | - Olga A. Tjurmina
- National Heart, Lung, and Blood Institute, Bethesda, Maryland, USA
| | | | - Rishi Arora
- Feinberg School of Medicine at Northwestern University, Chicago, Illinois, USA
| | | | - Mark W. Chapleau
- University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | | | | | | | - Michael R. Gold
- Medical University of South Carolina, Charleston, South Carolina, USA
| | | | - David S. Goldstein
- National Institute of Neurological Disorders and Stroke, Bethesda, Maryland, USA
| | - Beth A. Habecker
- Oregon Health and Science University School of Medicine, Portland, Oregon, USA
| | - M. Louis Handoko
- Amsterdam University Medical Centers, Amsterdam, the Netherlands
| | | | - James P. Hummel
- Yale University School of Medicine, New Haven, Connecticut, USA
| | | | | | | | | | - Marc A. Simon
- University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
- University of California-San Francisco, San Francisco, California, USA
| | | | - Stavros Stavrakis
- University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | | | | | - Richard L. Verrier
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | | | - George Sopko
- National Heart, Lung, and Blood Institute, Bethesda, Maryland, USA
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24
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Elevated muscle sympathetic activity in former smokers with heart failure. Clin Auton Res 2022; 32:151-154. [PMID: 35182279 DOI: 10.1007/s10286-022-00857-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 02/09/2022] [Indexed: 11/03/2022]
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25
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Shanks J, Abukar Y, Lever NA, Pachen M, LeGrice IJ, Crossman DJ, Nogaret A, Paton JFR, Ramchandra R. Reverse re-modelling chronic heart failure by reinstating heart rate variability. Basic Res Cardiol 2022; 117:4. [PMID: 35103864 PMCID: PMC8807455 DOI: 10.1007/s00395-022-00911-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/29/2021] [Accepted: 12/29/2021] [Indexed: 01/31/2023]
Abstract
Heart rate variability (HRV) is a crucial indicator of cardiovascular health. Low HRV is correlated with disease severity and mortality in heart failure. Heart rate increases and decreases with each breath in normal physiology termed respiratory sinus arrhythmia (RSA). RSA is highly evolutionarily conserved, most prominent in the young and athletic and is lost in cardiovascular disease. Despite this, current pacemakers either pace the heart in a metronomic fashion or sense activity in the sinus node. If RSA has been lost in cardiovascular disease current pacemakers cannot restore it. We hypothesized that restoration of RSA in heart failure would improve cardiac function. Restoration of RSA in heart failure was assessed in an ovine model of heart failure with reduced ejection fraction. Conscious 24 h recordings were made from three groups, RSA paced (n = 6), monotonically paced (n = 6) and heart failure time control (n = 5). Real-time blood pressure, cardiac output, heart rate and diaphragmatic EMG were recorded in all animals. Respiratory modulated pacing was generated by a proprietary device (Ceryx Medical) to pace the heart with real-time respiratory modulation. RSA pacing substantially increased cardiac output by 1.4 L/min (20%) compared to contemporary (monotonic) pacing. This increase in cardiac output led to a significant decrease in apnoeas associated with heart failure, reversed cardiomyocyte hypertrophy, and restored the T-tubule structure that is essential for force generation. Re-instating RSA in heart failure improves cardiac function through mechanisms of reverse re-modelling; the improvement observed is far greater than that seen with current contemporary therapies. These findings support the concept of re-instating RSA as a regime for patients who require a pacemaker.
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Affiliation(s)
- J. Shanks
- grid.9654.e0000 0004 0372 3343Manaaki Manawa—The Centre for Heart Research, Department of Physiology, University of Auckland, Park Road, Grafton, Auckland, New Zealand
| | - Y. Abukar
- grid.9654.e0000 0004 0372 3343Manaaki Manawa—The Centre for Heart Research, Department of Physiology, University of Auckland, Park Road, Grafton, Auckland, New Zealand
| | - N. A. Lever
- grid.414055.10000 0000 9027 2851Department of Cardiology, Auckland City Hospital, Auckland District Health Board, Park Road, Grafton, Auckland, New Zealand
| | - M. Pachen
- grid.9654.e0000 0004 0372 3343Manaaki Manawa—The Centre for Heart Research, Department of Physiology, University of Auckland, Park Road, Grafton, Auckland, New Zealand
| | - I. J. LeGrice
- grid.9654.e0000 0004 0372 3343Manaaki Manawa—The Centre for Heart Research, Department of Physiology, University of Auckland, Park Road, Grafton, Auckland, New Zealand
| | - D. J. Crossman
- grid.9654.e0000 0004 0372 3343Manaaki Manawa—The Centre for Heart Research, Department of Physiology, University of Auckland, Park Road, Grafton, Auckland, New Zealand
| | - A. Nogaret
- grid.7340.00000 0001 2162 1699Department of Physics, University of Bath, Claverton Down, Bath, UK
| | - J. F. R. Paton
- grid.9654.e0000 0004 0372 3343Manaaki Manawa—The Centre for Heart Research, Department of Physiology, University of Auckland, Park Road, Grafton, Auckland, New Zealand
| | - R. Ramchandra
- grid.9654.e0000 0004 0372 3343Manaaki Manawa—The Centre for Heart Research, Department of Physiology, University of Auckland, Park Road, Grafton, Auckland, New Zealand
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26
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Heart Rate in Patients with SARS-CoV-2 Infection: Prevalence of High Values at Discharge and Relationship with Disease Severity. J Clin Med 2021; 10:jcm10235590. [PMID: 34884293 PMCID: PMC8658577 DOI: 10.3390/jcm10235590] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 11/25/2021] [Accepted: 11/26/2021] [Indexed: 02/03/2023] Open
Abstract
The most common arrhythmia associated with COronaVIrus-related Disease (COVID) infection is sinus tachycardia. It is not known if high Heart Rate (HR) in COVID is simply a marker of higher systemic response to sepsis or if its persistence could be related to a long-term autonomic dysfunction. The aim of our work is to assess the prevalence of elevated HR at discharge in patients hospitalized for COVID-19 and to evaluate the variables associated with it. We enrolled 697 cases of SARS-CoV2 infection admitted in our hospital after February 21 and discharged within 23 July 2020. We collected data on clinical history, vital signs, laboratory tests and pharmacological treatment. Severe disease was defined as the need for Intensive Care Unit (ICU) admission and/or mechanical ventilation. Median age was 59 years (first-third quartile 49, 74), and male was the prevalent gender (60.1%). 84.6% of the subjects showed a SARS-CoV-2 related pneumonia, and 13.2% resulted in a severe disease. Mean HR at admission was 90 ± 18 bpm with a mean decrease of 10 bpm to discharge. Only 5.5% of subjects presented HR > 100 bpm at discharge. Significant predictors of discharge HR at multiple linear model were admission HR (mean increase = β = 0.17 per bpm, 95% CI 0.11; 0.22, p < 0.001), haemoglobin (β = −0.64 per g/dL, 95% CI −1.19; −0.09, p = 0.023) and severe disease (β = 8.42, 95% CI 5.39; 11.45, p < 0.001). High HR at discharge in COVID-19 patients is not such a frequent consequence, but when it occurs it seems strongly related to a severe course of the disease.
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27
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Hamaoka T, Murai H, Hirai T, Sugimoto H, Mukai Y, Inoue O, Takashima S, Kato T, Takata S, Usui S, Sakata K, Kawashiri MA, Takamura M. Different Responses of Muscle Sympathetic Nerve Activity to Dapagliflozin Between Patients With Type 2 Diabetes With and Without Heart Failure. J Am Heart Assoc 2021; 10:e022637. [PMID: 34719241 PMCID: PMC8751957 DOI: 10.1161/jaha.121.022637] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Background Sodium-glucose cotransporter 2 inhibitors improve cardiovascular outcomes in patients with diabetes with and without heart failure (HF). However, their influence on sympathetic nerve activity (SNA) remains unclear. The purpose of this study was to evaluate the effect of sodium-glucose cotransporter 2 inhibitors on SNA and compare the responses of SNA to sodium-glucose cotransporter 2 inhibitors in patients with type 2 diabetes with and without HF. Methods and Results Eighteen patients with type 2 diabetes, 10 with HF (65.4±3.68 years) and 8 without HF (63.3±3.62 years), were included. Muscle SNA (MSNA), heart rate, and blood pressure were recorded before and 12 weeks after administration of dapagliflozin (5 mg/day). Sympathetic and cardiovagal baroreflex sensitivity were simultaneously calculated. Brain natriuretic peptide level increased significantly at baseline in patients with HF than those without HF, while MSNA, blood pressure, and hemoglobin A1c did not differ between the 2 groups. Fasting blood glucose and homeostatic model assessment of insulin resistance did not change in either group after administering dapagliflozin. MSNA decreased significantly in both groups. However, the reduction in MSNA was significantly higher in patients with HF than patients with non-HF (-20.2±3.46 versus -9.38±3.65 bursts/100 heartbeats; P=0.049), which was concordant with the decrease in brain natriuretic peptide. Conclusions Dapagliflozin significantly decreased MSNA in patients with type 2 diabetes regardless of its blood glucose-lowering effect. Moreover, the reduction in MSNA was more prominent in patients with HF than in patients with non-HF. These results indicate that the cardioprotective effects of sodium-glucose cotransporter 2 inhibitors may, in part, be attributed to improved SNA.
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Affiliation(s)
- Takuto Hamaoka
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Hisayoshi Murai
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan.,Kanazawa Municipal Hospital Kanazawa Japan
| | - Tadayuki Hirai
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Hiroyuki Sugimoto
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Yusuke Mukai
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Oto Inoue
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Shinichiro Takashima
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Takeshi Kato
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | | | - Soichiro Usui
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Kenji Sakata
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Masa-Aki Kawashiri
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Masayuki Takamura
- Department of Cardiovascular Medicine Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
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Du X. Sympatho-adrenergic mechanisms in heart failure: new insights into pathophysiology. MEDICAL REVIEW (BERLIN, GERMANY) 2021; 1:47-77. [PMID: 37724075 PMCID: PMC10388789 DOI: 10.1515/mr-2021-0007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/02/2021] [Indexed: 09/20/2023]
Abstract
The sympathetic nervous system is activated in the setting of heart failure (HF) to compensate for hemodynamic instability. However, acute sympathetic surge or sustained high neuronal firing rates activates β-adrenergic receptor (βAR) signaling contributing to myocardial remodeling, dysfunction and electrical instability. Thus, sympatho-βAR activation is regarded as a hallmark of HF and forms pathophysiological basis for β-blocking therapy. Building upon earlier research findings, studies conducted in the recent decades have significantly advanced our understanding on the sympatho-adrenergic mechanism in HF, which forms the focus of this article. This review notes recent research progress regarding the roles of cardiac β2AR or α1AR in the failing heart, significance of β1AR-autoantibodies, and βAR signaling through G-protein independent signaling pathways. Sympatho-βAR regulation of immune cells or fibroblasts is specifically discussed. On the neuronal aspects, knowledge is assembled on the remodeling of sympathetic nerves of the failing heart, regulation by presynaptic α2AR of NE release, and findings on device-based neuromodulation of the sympathetic nervous system. The review ends with highlighting areas where significant knowledge gaps exist but hold promise for new breakthroughs.
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Affiliation(s)
- Xiaojun Du
- Faculty of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, 76 West Yanta Road, Xi’an710061, Shaanxi, China
- Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC3004, Australia
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29
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Urbancsek R, Csanádi Z, Forgács IN, Papp TB, Boczán J, Barta J, Jenei C, Nagy L, Rudas L. Sympathetic activation in heart failure with reduced and mildly reduced ejection fraction: the role of aetiology. ESC Heart Fail 2021; 8:5112-5120. [PMID: 34492735 PMCID: PMC8712902 DOI: 10.1002/ehf2.13580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 07/12/2021] [Accepted: 08/11/2021] [Indexed: 01/08/2023] Open
Abstract
Aim While sympathetic overactivity in heart failure (HF) with reduced ejection fraction (HFrEF; EF < 40%) is well‐documented, it is ill‐defined in patients with mildly reduced EF (HFmrEF; EF 40–49%). Furthermore, the significance of ischaemic versus non‐ischaemic aetiology in sympathetic activation is also unclear and has yet to be studied in HF. Our goal was to compare muscle sympathetic nerve activity (MSNA) in HFmrEF and HFrEF patients and in healthy subjects, as well as to elucidate the influence of the underlying disease. Methods and results Twenty‐three HFrEF (age 58 ± 10 years), 33 HFmrEF patients (age 61 ± 10 years), including 11 subjects with non‐ischaemic cardiomyopathy in each HF groups and 10 healthy controls (age 55 ± 10 years), were studied. MSNA—detected by peroneal microneurography, continuous arterial pressure, and ECG—was recorded. MSNA frequency (burst/min) and incidence (burst/100 cycles) were calculated. Association with the patients' characteristics were assessed, and aetiology‐based comparisons were performed. Burst frequency demonstrated a significant stepwise increase in both HFmrEF (41 ± 11 burst/min) and HFrEF (58 ± 17 burst/min, P < 0.001) patients as compared with controls (27 ± 9; P < 0.001 for both HF groups). Similarly, burst incidences were 66 ± 17, 82 ± 15, and 36 ± 10 burst/100 cycles in HFmrEF, HFrEF patients, and in healthy controls, respectively (P < 0.001 for all). Burst frequencies in HF patients showed significant correlation with NT‐proBNP levels, and significant inverse correlations with the subjects' mean RR intervals, stroke volumes, pulse pressures, and EF. Conclusions Muscle sympathetic nerve activity parameters indicated significant sympathetic activation in both HFmrEF and HFrEF patients as compared with healthy controls with no difference in relation to ischaemic versus non‐ischaemic aetiology.
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Affiliation(s)
- Réka Urbancsek
- Faculty of Medicine, Department of Cardiology, University of Debrecen, Móricz Zsigmond körút 22, Debrecen, 4032, Hungary
| | - Zoltán Csanádi
- Faculty of Medicine, Department of Cardiology, University of Debrecen, Móricz Zsigmond körút 22, Debrecen, 4032, Hungary
| | - Ildikó Noémi Forgács
- Faculty of Medicine, Department of Cardiology, University of Debrecen, Móricz Zsigmond körút 22, Debrecen, 4032, Hungary
| | - Tímea Bianka Papp
- Faculty of Medicine, Department of Cardiology, University of Debrecen, Móricz Zsigmond körút 22, Debrecen, 4032, Hungary
| | - Judit Boczán
- Faculty of Medicine, Department of Neurology, University of Debrecen, Debrecen, Hungary
| | - Judit Barta
- Faculty of Medicine, Department of Cardiology, University of Debrecen, Móricz Zsigmond körút 22, Debrecen, 4032, Hungary
| | - Csaba Jenei
- Faculty of Medicine, Department of Cardiology, University of Debrecen, Móricz Zsigmond körút 22, Debrecen, 4032, Hungary
| | - László Nagy
- Faculty of Medicine, Department of Cardiology, University of Debrecen, Móricz Zsigmond körút 22, Debrecen, 4032, Hungary
| | - László Rudas
- Department of Anaesthesiology and Intensive Care, University of Szeged, Szeged, Hungary
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Komori T, Hoshide S, Kario K. Differential Effect of the Morning Blood Pressure Surge on Prognoses Between Heart Failure With Reduced and Preserved Ejection Fractions. Circ J 2021; 85:1535-1542. [PMID: 33853990 DOI: 10.1253/circj.cj-20-0972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Rising blood pressure (BP) in the morning, known as the morning BP surge (MBPS), is known to pose a risk for cardiovascular events in hypertensive individuals. It was not known whether the MBPS was associated with a worse prognosis in patients with heart failure (HF) with a reduced (HFrEF) or preserved (HFpEF) ejection fraction.Methods and Results:We performed a prospective, observational cohort study of hospitalized HF patients who underwent ambulatory BP monitoring (ABPM). The MBPS was calculated by subtracting the mean systolic BP (SBP) during the 1 h that included the lowest sleep BP from the mean SBP during the 2 h after waking. The MBPS group was defined as the top decile of MBPS (>40 mmHg). In all, 456 hospitalized HF patients (mean [±SD] age 68±13 years, 63.9% male) were followed-up for a median of 1.67 years. There were 90 events (16.3 per 100 person-years) of the composite outcome (all-cause mortality and worsening HF) in the HFrEF group, compared with 53 events (19.6 per 100 person-years) in the HFpEF group. Multivariate Cox regression analysis showed that MBPS was a significant predictor of outcome (hazard ratio 2.84, 95% confidence interval 1.58-5.10, P<0.01) in the HFrEF but not HFpEF group. CONCLUSIONS MBPS was found to be a novel predictor of worsening HF in patients with HFrEF.
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Affiliation(s)
- Takahiro Komori
- Division of Cardiovascular Medicine, Department of Medicine, Jichi Medical University School of Medicine
| | - Satoshi Hoshide
- Division of Cardiovascular Medicine, Department of Medicine, Jichi Medical University School of Medicine
| | - Kazuomi Kario
- Division of Cardiovascular Medicine, Department of Medicine, Jichi Medical University School of Medicine
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31
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Hamaoka T, Blaha C, Luck JC, Leuenberger UA, Sinoway LI, Cui J. Acute effects of sublingual nitroglycerin on cardiovagal and sympathetic baroreflex sensitivity. Am J Physiol Regul Integr Comp Physiol 2021; 321:R525-R536. [PMID: 34378422 DOI: 10.1152/ajpregu.00304.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of nitroglycerin (glyceryl trinitrate, GTN) on baroreflex sensitivity (BRS) are incompletely understood. Moreover, there are no reports evaluating the acute responses in both the sympathetic BRS (SBRS) and the cardiovagal BRS (CBRS) to the administration of sublingual GTN. We hypothesized that sublingual GTN modulates both CBRS and SBRS. In 10 healthy subjects, beat-to-beat heart rate (HR), blood pressure (BP) and muscle sympathetic nerve activity (MSNA) were recorded before and for 10 min after sublingual administration of GTN 0.4 mg. SBRS was evaluated from the relationship between spontaneous variations in diastolic BP and MSNA. CBRS was assessed with the sequence technique. These variables were assessed during baseline, during min 3rd - 6th (Post A) and 7th -10th min (Post B) after GTN administration. Two min after GTN administration, MSNA increased significantly and remained significantly elevated during recording. Compared to baseline, CBRS decreased significantly (Post A: 12.9 ± 1.6 to 7.1 ± 1.0 ms/mmHg, P < 0.05), while SBRS increased significantly (Post A: 0.8 ± 0.2 to 1.5 ± 0.2 units・beat-1・mmHg-1, P < 0.05) with an upward shift of the operating point. There were no differences in these variables between Post A and B. A clinical dose of GTN increased MSNA rapidly through effects on both CBRS and SBRS. These effects should be kept in mind when nitrates are used to clinically treat chest pain and acute coronary syndromes and used as vasodilators in experimental settings.
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Affiliation(s)
- Takuto Hamaoka
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Cheryl Blaha
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - J Carter Luck
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Urs A Leuenberger
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Lawrence I Sinoway
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Jian Cui
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA, United States
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Grassi G, Mancia G, Esler M. CENTRAL AND PERIPHERAL SYMPATHETIC ACTIVATION IN HEART FAILURE. Cardiovasc Res 2021; 118:1857-1871. [PMID: 34240147 DOI: 10.1093/cvr/cvab222] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 07/02/2021] [Indexed: 11/12/2022] Open
Abstract
The sympathetic nervous system overdrive occurring in heart failure has been reported since more than half a century. Refinements in the methodological approaches to assess human sympathetic neural function have allowed during recent years to better define various aspects related to the neuroadrenergic alteration. These include 1) the different participation of the individual regional sympathetic cardiovascular districts at the process, 2) the role of the central nervous system in determining the neuroadrenergic overdrive, 3) the involvement of baroreflex, cardiopulmonary reflex and chemoreflex mechanisms in the phoenomenon, which is also closely linked to inflammation and the immune reaction, 4) the relationships with the severity of the disease, its ischaemic or idiopathic nature and the preserved or reduced left ventricular ejection fraction and 5) the adverse functional and structural impact of the sympathetic activation on cardiovascular organs, such as the brain, the heart and the kidneys. Information have been also gained on the active role exerted by the sympathetic activation on the disease outcome and its potential relevance as target of the therapeutic interventions based on non-pharmacological, pharmacological and invasive approaches, including the renal denervation, the splanchnic sympathetic nerve ablation and the carotid baroreflex stimulation. The still undefined aspects of the neurogenic alterations and the unmet goals of the therapeutic approach having the sympathetic activation as a target of the intervention will be finally mentioned.
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Affiliation(s)
- Guido Grassi
- Clinica Medica, Department of Medicine and Surgery, University of Milano-Bicocca
| | - Giuseppe Mancia
- Policlinico di Monza and University Milano-Bicocca, Milan, Italy
| | - Murray Esler
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
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Spector S, Debi R. Worth the risk? Effects of prolonged hypoxia and hypercapnia on ventilatory responses in patients with bilateral resection of the carotid bodies. J Physiol 2021; 599:3637-3638. [PMID: 34101181 DOI: 10.1113/jp281549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Steven Spector
- Department of Biology, York University, Toronto, ON, Canada
| | - Ryan Debi
- Department of Biology, York University, Toronto, ON, Canada
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34
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Bunsawat K, Ratchford SM, Alpenglow JK, Stehlik J, Smith AS, Richardson RS, Wray DW. Sympathoinhibitory effect of sacubitril-valsartan in heart failure with reduced ejection fraction: A pilot study. Auton Neurosci 2021; 235:102834. [PMID: 34186274 DOI: 10.1016/j.autneu.2021.102834] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 05/07/2021] [Accepted: 06/13/2021] [Indexed: 01/08/2023]
Abstract
Chronic sympathetic nervous system (SNS) overactivity, characteristic of heart failure (HF) with reduced ejection fraction (HFrEF), is associated with poor prognosis and contributes to increased mortality risk. Sacubitril-valsartan is a recently approved, first-in-class, angiotensin receptor neprilysin inhibitor (ARNI) drug that markedly reduces the risks of death from cardiovascular causes and hospitalization for HF in patients with HFrEF, but the physiological mechanisms underlying these benefits are not fully understood. This single-arm, open-label, prospective study sought to test the hypothesis that short-term treatment with sacubitril-valsartan reduces SNS activity, measured directly via muscle sympathetic nerve activity (MSNA), in patients with HFrEF. MSNA, heart rate (HR), and arterial blood pressure (BP) were assessed in stable Class II and III patients with HFrEF (n = 9, 69 ± 8 yrs.; 28.6 ± 3.6 kg/m2) on contemporary, guideline-directed medical treatment who were subsequently started on sacubitril-valsartan. These measurements were repeated after two months of treatment with sacubitril-valsartan. Sacubitril-valsartan reduced MSNA burst frequency (baseline: 43 ± 10 bursts/min; 2-month: 36 ± 10 bursts/min, p = 0.05) and burst incidence (baseline: 68 ± 16 bursts/100 heartbeats; 2-month: 55 ± 16 bursts/100 heartbeats, p = 0.02), while HR and BP were unchanged following of treatment (p > 0.05). These preliminary findings provide new evidence regarding the ability of sacubitril-valsartan to rapidly reduce SNS activity in patients with HFrEF, suggesting the presence of a novel sympathoinhibitory effect of this new drug class.
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Affiliation(s)
- Kanokwan Bunsawat
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT, United States of America.
| | - Stephen M Ratchford
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT, United States of America; Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT, United States of America; Department of Health and Exercise Science, Appalachian State University, Boone, NC, United States of America
| | - Jeremy K Alpenglow
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, United States of America
| | - Josef Stehlik
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, United States of America
| | - Adam S Smith
- Department of Pharmacy Services, University of Utah, Salt Lake City, UT, United States of America
| | - Russell S Richardson
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT, United States of America; Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT, United States of America; Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, United States of America
| | - D Walter Wray
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT, United States of America; Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT, United States of America; Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, United States of America
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Abstract
Heart failure is an epidemic disease which affects about 1% to 2% of the population worldwide. Both, the etiology and phenotype of heart failure differ largely. Following a cardiac injury (e.g., myocardial infarction, increased preload or afterload) cellular, structural and neurohumoral modulations occur that affect the phenotype being present. These processes influence the cell function among intra- as well as intercellular behavior. In consequence, activation of the sympathoadrenergic and renin-angiotensin-aldosterone-system takes place leading to adaptive mechanisms, which are accompanied by volume overload, tachycardia, dyspnoea and further deterioration of the cellular function (vicious circle). There exists no heart failure specific clinical sign; the clinical symptomatic shows progressive deterioration acutely or chronically. As a measure of cellular dysfunction, the level of neurohormones (norepinephrine) and natriuretic peptides (e.g., NT-pro BNP) increase. For the diagnosis of heart failure, noninvasive (echocardiography, NMR, NT-proBNP) and invasive (heart catheterization, biopsy) diagnostic procedures are implemented. Modulation of the activated systems by ß-blocker, ACE-inhibitors and ARNI improve outcome and symptoms in heart failure patients with left ventricular dysfunction. Interventional and surgical therapy options may be performed as well. The understanding of the underlying pathophysiology of heart failure is essential to initiate the adequate therapeutic option individually for each patient. Furthermore, prevention of cardiovascular risk factors is essential to lower the risk of heart failure.
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Affiliation(s)
- Robert H G Schwinger
- Kardiologie, Nephrologie/Hypertonie, Pneumologie, Internistische Intensivmedizin, Medizinische Klinik II, Klinikum Weiden, Weiden, Germany
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36
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Philbois SV, Facioli TP, Gastaldi AC, Rodrigues JAL, Tank J, Fares TH, Rodrigues KP, Souza HCD. Important differences between hypertensive middle-aged women and men in cardiovascular autonomic control-a critical appraisal. Biol Sex Differ 2021; 12:11. [PMID: 33430973 PMCID: PMC7802327 DOI: 10.1186/s13293-020-00355-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 12/26/2020] [Indexed: 11/17/2022] Open
Abstract
Background Normotensive premenopausal women show a vagal predominance of cardiac autonomic modulation, whereas age-matched men show a predominance of sympathetic modulation. However, some women develop systemic arterial hypertension (SAH) even with preserved ovarian function. Our hypothesis is that these women may have cardiovascular autonomic parameters similar to those of hypertensive men, even when subjected to pharmacological treatment. We aimed to investigate cardiovascular autonomic control and baroreflex sensitivity (BRS) in hypertensive premenopausal women and age-matched men. Methods One hundred volunteers between 18 and 45 years of age were assigned to two groups (50 participants each): a hypertensive group including patients with a history of SAH for at least 6 months (25 men and 25 women), who were under treatment with monotherapy (losartan, 25–50 mg/kg); and a normotensive group (25 men and 25 women). Anthropometric, hemodynamic, metabolic, and autonomic cardiovascular assessments were performed focusing on BRS, autonomic modulation of heart rate variability (HRV), and blood pressure variability (BPV). Results On HRV analysis, women showed higher values of high-frequency (HF) oscillations in absolute and normalized units, lower values of low-frequency (LF) in normalized units, and lower LF/HF ratio, as compared with men. When the normotensive and hypertensive groups were compared, hypertensive groups showed lower values of total variance and of LF and HF bands in absolute units. On BRS, hypertensive groups showed lower values than the normotensive group. Conclusion Regardless of blood pressure control through pharmacological treatment, hypertensive patients continued to have reduced HRV compared to normotensive, and hypertensive men had more autonomic impairment than hypertensive premenopausal women.
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Affiliation(s)
- Stella V Philbois
- Laboratory of Exercise Physiology and Cardiovascular Physiotherapy, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Vila Monte Alegre, Ribeirão Preto, SP, 14049-900, Brazil
| | - Tábata P Facioli
- Laboratory of Exercise Physiology and Cardiovascular Physiotherapy, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Vila Monte Alegre, Ribeirão Preto, SP, 14049-900, Brazil
| | - Ada C Gastaldi
- Laboratory of Exercise Physiology and Cardiovascular Physiotherapy, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Vila Monte Alegre, Ribeirão Preto, SP, 14049-900, Brazil
| | - Jhennyfer A L Rodrigues
- Laboratory of Exercise Physiology and Cardiovascular Physiotherapy, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Vila Monte Alegre, Ribeirão Preto, SP, 14049-900, Brazil
| | - Jens Tank
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
| | - Thauane H Fares
- Laboratory of Exercise Physiology and Cardiovascular Physiotherapy, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Vila Monte Alegre, Ribeirão Preto, SP, 14049-900, Brazil
| | - Karine P Rodrigues
- Laboratory of Exercise Physiology and Cardiovascular Physiotherapy, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Vila Monte Alegre, Ribeirão Preto, SP, 14049-900, Brazil
| | - Hugo C D Souza
- Laboratory of Exercise Physiology and Cardiovascular Physiotherapy, Department of Health Sciences, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Vila Monte Alegre, Ribeirão Preto, SP, 14049-900, Brazil.
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37
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Tadic M, Cuspidi C. Sympathetic overdrive in heart failure: What we can do? Int J Cardiol 2020; 321:126-127. [PMID: 32726609 DOI: 10.1016/j.ijcard.2020.07.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 07/22/2020] [Accepted: 07/23/2020] [Indexed: 10/23/2022]
Affiliation(s)
- Marijana Tadic
- University Hospital "Dr. Dragisa Misovic - Dedinje", Department of Cardiology, 11000 Belgrade, Serbia.
| | - Cesare Cuspidi
- University of Milan-Bicocca and Istituto Auxologico Italiano, Clinical Research Unit, Viale della Resistenza 23, 20036 Meda, Italy
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38
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Badrov MB, Mak S, Floras JS. Cardiovascular Autonomic Disturbances in Heart Failure With Preserved Ejection Fraction. Can J Cardiol 2020; 37:609-620. [PMID: 33310140 DOI: 10.1016/j.cjca.2020.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 02/09/2023] Open
Abstract
In heart failure with reduced ejection fraction (HFrEF), diminished tonic and reflex vagal heart rate modulation and exaggerated sympathetic outflow and neural norepinephrine release are evident from disease inception. Each of these disturbances of autonomic regulation has been independently associated with shortened survival, and β-adrenoceptor antagonism and therapeutic autonomic modulation by other means have been demonstrated, in clinical trials, to lessen symptoms and prolong survival. In contrast, data concerning the autonomic status of patients with heart failure with preserved ejection fraction (HFpEF) are comparatively sparse. Little is known concerning the prognostic consequences of autonomic dysregulation in such individuals, and therapies applied with success in HFrEF have in most trials failed to improve symptoms or survival of those with HFpEF. A recent HFpEF Expert Scientific Panel report emphasised that without a deeper understanding of the pathophysiology of HFpEF, establishing effective treatment will be challenging. One aspect of such pathology may be cardiovascular autonomic disequilibrium, often worsened by acute exercise or routine daily activity. This review aims to summarise existing knowledge concerning parasympathetic and sympathetic function of patients with HFpEF, consider potential mechanisms and specific consequences of autonomic disturbances that have been identified, and propose hypotheses for future investigation.
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Affiliation(s)
- Mark B Badrov
- Division of Cardiology, Department of Medicine, University Health Network and Sinai Health System, University of Toronto, Toronto, Ontario, Canada
| | - Susanna Mak
- Division of Cardiology, Department of Medicine, University Health Network and Sinai Health System, University of Toronto, Toronto, Ontario, Canada
| | - John S Floras
- Division of Cardiology, Department of Medicine, University Health Network and Sinai Health System, University of Toronto, Toronto, Ontario, Canada.
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Grassi G, Seravalle G, Esler M. Sympathomodulation in congestive heart failure: From drugs to devices. Int J Cardiol 2020; 321:118-125. [DOI: 10.1016/j.ijcard.2020.07.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 01/15/2023]
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40
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Bunsawat K, Ratchford SM, Alpenglow JK, Ryan JJ, Richardson RS, Wray DW. Direct Assessment of Muscle Sympathetic Nerve Activity During Exercise in Heart Failure With Preserved Ejection Fraction: A Case Report. J Card Fail 2020; 27:114-116. [PMID: 33166658 DOI: 10.1016/j.cardfail.2020.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/20/2020] [Accepted: 11/03/2020] [Indexed: 11/18/2022]
Affiliation(s)
- Kanokwan Bunsawat
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT
| | - Stephen M Ratchford
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT; Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT; Department of Health and Exercise Science, Appalachian State University, Boone, NC
| | - Jeremy K Alpenglow
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT
| | - John J Ryan
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT
| | - Russell S Richardson
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT; Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT; Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT
| | - D Walter Wray
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, UT; Geriatric Research, Education, and Clinical Center, George E. Wahlen Department of Veterans Affairs Medical Center, Salt Lake City, UT; Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT.
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Triposkiadis F, Butler J, Abboud FM, Armstrong PW, Adamopoulos S, Atherton JJ, Backs J, Bauersachs J, Burkhoff D, Bonow RO, Chopra VK, de Boer RA, de Windt L, Hamdani N, Hasenfuss G, Heymans S, Hulot JS, Konstam M, Lee RT, Linke WA, Lunde IG, Lyon AR, Maack C, Mann DL, Mebazaa A, Mentz RJ, Nihoyannopoulos P, Papp Z, Parissis J, Pedrazzini T, Rosano G, Rouleau J, Seferovic PM, Shah AM, Starling RC, Tocchetti CG, Trochu JN, Thum T, Zannad F, Brutsaert DL, Segers VF, De Keulenaer GW. The continuous heart failure spectrum: moving beyond an ejection fraction classification. Eur Heart J 2020; 40:2155-2163. [PMID: 30957868 DOI: 10.1093/eurheartj/ehz158] [Citation(s) in RCA: 175] [Impact Index Per Article: 43.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/05/2019] [Accepted: 03/08/2019] [Indexed: 12/17/2022] Open
Abstract
Randomized clinical trials initially used heart failure (HF) patients with low left ventricular ejection fraction (LVEF) to select study populations with high risk to enhance statistical power. However, this use of LVEF in clinical trials has led to oversimplification of the scientific view of a complex syndrome. Descriptive terms such as 'HFrEF' (HF with reduced LVEF), 'HFpEF' (HF with preserved LVEF), and more recently 'HFmrEF' (HF with mid-range LVEF), assigned on arbitrary LVEF cut-off points, have gradually arisen as separate diseases, implying distinct pathophysiologies. In this article, based on pathophysiological reasoning, we challenge the paradigm of classifying HF according to LVEF. Instead, we propose that HF is a heterogeneous syndrome in which disease progression is associated with a dynamic evolution of functional and structural changes leading to unique disease trajectories creating a spectrum of phenotypes with overlapping and distinct characteristics. Moreover, we argue that by recognizing the spectral nature of the disease a novel stratification will arise from new technologies and scientific insights that will shape the design of future trials based on deeper understanding beyond the LVEF construct alone.
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Affiliation(s)
| | - Javed Butler
- Department of Medicine-L650, University of Mississippi Medical Center, Jackson, MS, USA
| | - Francois M Abboud
- Abboud Cardiovascular Research Center, University of Iowa, Iowa City, IA, USA
| | - Paul W Armstrong
- Canadian VIGOUR Centre, University of Alberta, Edmonton, Alberta, Canada
| | - Stamatis Adamopoulos
- Transplant and Mechanical Circulatory Support Unit, Onassis Cardiac Surgery Center, Athens, Greece
| | - John J Atherton
- Department of Cardiology, Royal Brisbane and Women's Hospital, University of Queensland School of Medicine, Brisbane, Australia
| | - Johannes Backs
- Department of Molecular Cardiology and Epigenetics, Heidelberg University, Heidelberg, Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
| | | | - Robert O Bonow
- Bluhm Cardiovascular Institute, Northwestern University Feinberg School of Medicine, Northwestern Memorial Hospital, Chicago, IL, USA
| | - Vijay K Chopra
- Department of Cardiology, Medanta Medicity, Gurugram, Haryana, India
| | - Rudolf A de Boer
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Leon de Windt
- Department of Cardiology, Faculty of Health, Medicine and Life Sciences, School for Cardiovascular Diseases, Maastricht University, Maastricht, The Netherlands
| | - Nazha Hamdani
- Department of Systems Physiology, Ruhr University Bochum, Bochum, Germany
| | - Gerd Hasenfuss
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Stephane Heymans
- Department of Cardiology, CARIM School for Cardiovascular Diseases Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Jean-Sébastien Hulot
- Université Paris-Descartes, Sorbonne Paris Cité, Paris, France.,Paris Cardiovascular Research Center, INSERM UMR 970, Paris, France.,Hôpital Européen Georges Pompidou, AP-HP, Paris, France
| | - Marvin Konstam
- The CardioVascular Center of Tufts Medical Center, Boston, MA, USA
| | - Richard T Lee
- Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA
| | - Wolfgang A Linke
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Ida G Lunde
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Alexander R Lyon
- Cardiovascular Research Centre, Royal Brompton Hospital, London, UK.,National Heart and Lung Institute, Imperial College London, London, UK
| | - Christoph Maack
- Comprehensive Heart Failure Center, University Clinic Würzburg, Würzburg, Germany
| | - Douglas L Mann
- Department of Medicine, Center for Cardiovascular Research, Washington University School of Medicine, St. Louis Missouri, MO, USA
| | - Alexandre Mebazaa
- Department of Anaesthesiology and Critical Care Medicine, AP-HP, Saint Louis and Lariboisière University Hospitals, Inserm U 942, Paris, France
| | | | | | - Zoltan Papp
- Division of Clinical Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - John Parissis
- Heart Failure Unit, Department of Cardiology, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Thierry Pedrazzini
- Experimental Cardiology Unit, Department of Cardiovascular Medicine, University of Lausanne Medical School, Lausanne, Switzerland
| | - Giuseppe Rosano
- Department of Medical Sciences, IRCCS San Raffaele, Centre for Clinical and Basic Research, Pisana Rome, Italy
| | - Jean Rouleau
- Montreal Heart Institute and University of Montreal, Montreal, Quebec, Canada
| | | | - Ajay M Shah
- School of Cardiovascular Medicine & Sciences, British Heart Foundation Centre, King's College London, London, UK
| | | | - Carlo G Tocchetti
- Department of Translational Medical Sciences, Federico II University, Naples, Italy
| | - Jean-Noel Trochu
- CIC INSERM 1413, Institut du thorax, UMR INSERM 1087, University Hospital of Nantes, Nantes, France
| | - Thomas Thum
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hanover, Germany
| | - Faiez Zannad
- Inserm CIC 1433, Université de Lorrain, CHU de Nancy, Nancy, France
| | | | - Vincent F Segers
- Laboratory of Physiopharmacology, Antwerp University, Universiteitsplein 1, Building T, Wilrijk, Antwerp, Belgium.,Division of Cardiology, Antwerp University Hospital, Edegem, Belgium
| | - Gilles W De Keulenaer
- Laboratory of Physiopharmacology, Antwerp University, Universiteitsplein 1, Building T, Wilrijk, Antwerp, Belgium.,ZNA Hartcentrum, Antwerp, Belgium
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42
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Heinzel FR, Hegemann N, Hohendanner F, Primessnig U, Grune J, Blaschke F, de Boer RA, Pieske B, Schiattarella GG, Kuebler WM. Left ventricular dysfunction in heart failure with preserved ejection fraction-molecular mechanisms and impact on right ventricular function. Cardiovasc Diagn Ther 2020; 10:1541-1560. [PMID: 33224773 DOI: 10.21037/cdt-20-477] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The current classification of heart failure (HF) based on left ventricular (LV) ejection fraction (EF) identifies a large group of patients with preserved ejection fraction (HFpEF) with significant morbidity and mortality but without prognostic benefit from current HF therapy. Co-morbidities and conditions such as arterial hypertension, diabetes mellitus, chronic kidney disease, adiposity and aging shape the clinical phenotype and contribute to mortality. LV diastolic dysfunction and LV structural remodeling are hallmarks of HFpEF, and are linked to remodeling of the cardiomyocyte and extracellular matrix. Pulmonary hypertension (PH) and right ventricular dysfunction (RVD) are particularly common in HFpEF, and mortality is up to 10-fold higher in HFpEF patients with vs. without RV dysfunction. Here, we review alterations in cardiomyocyte function (i.e., ion homeostasis, sarcomere function and cellular metabolism) associated with diastolic dysfunction and summarize the main underlying cellular pathways. The contribution and interaction of systemic and regional upstream signaling such as chronic inflammation, neurohumoral activation, and NO-cGMP-related pathways are outlined in detail, and their diagnostic and therapeutic potential is discussed in the context of preclinical and clinical studies. In addition, we summarize prevalence and pathomechanisms of RV dysfunction in the context of HFpEF and discuss mechanisms connecting LV and RV dysfunction in HFpEF. Dissecting the molecular mechanisms of LV and RV dysfunction in HFpEF may provide a basis for an improved classification of HFpEF and for therapeutic approaches tailored to the molecular phenotype.
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Affiliation(s)
- Frank R Heinzel
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - Niklas Hegemann
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.,Institute of Physiology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Felix Hohendanner
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - Uwe Primessnig
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - Jana Grune
- DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany.,Institute of Physiology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Florian Blaschke
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - Rudolf A de Boer
- Department of Cardiology, Groningen, University Medical Center Groningen, University of Groningen, The Netherlands
| | - Burkert Pieske
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany.,Department of Internal Medicine and Cardiology, German Heart Center, Berlin, Germany
| | | | - Wolfgang M Kuebler
- DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany.,Institute of Physiology, Charité-Universitätsmedizin Berlin, Berlin, Germany
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43
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Incognito AV, Samora M, Shepherd AD, Cartafina RA, Guimarães GMN, Daher M, Vianna LC, Millar PJ. Sympathetic arterial baroreflex hysteresis in humans: different patterns during low- and high-pressure levels. Am J Physiol Heart Circ Physiol 2020; 319:H787-H792. [PMID: 32857604 DOI: 10.1152/ajpheart.00505.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fluctuations in diastolic pressure modulate muscle sympathetic nerve activity (MSNA) through the arterial baroreflex. A higher sympathetic baroreflex sensitivity (sBRS) to pressure falls compared with rises has been reported; however, the underlying mechanisms are unclear. We assessed whether beat-to-beat falling and rising diastolic pressures operate on two distinct baroreflex response curves. Twenty-two men (32 ± 8 yr) underwent sequential bolus injections of nitroprusside and phenylephrine (modified Oxford test) with continuous recording of heart rate, blood pressure, and MSNA. The weighted negative linear regression slope between falling or rising diastolic pressure and MSNA burst incidence quantified sBRSfall and sBRSrise, respectively. The diastolic pressure evoking a MSNA burst incidence of 50 (T50) was calculated. sBRSfall was greater than sBRSrise (-6.24 ± 2.80 vs. -4.34 ± 2.16 bursts·100 heartbeats-1·mmHg-1, P = 0.01) and had a narrower operating range (14 ± 8 vs. 20 ± 10 mmHg, P = 0.01) that was shifted rightward (T50, 75 ± 9 and 70 ± 11 mmHg, P < 0.001). At diastolic pressures below baseline, sBRSfall was less than sBRSrise (-1.81 ± 1.31 vs. -3.59 ± 1.70 bursts·100 heartbeats-1·mmHg-1, P = 0.003) as low absolute pressures operated closer to the saturation plateau on the falling, compared with the rising pressure curve. At pressures above baseline, sBRSfall was greater than sBRSrise (-5.23 ± 1.94 and -3.79 ± 1.67 bursts·100 heartbeats-1·mmHg-1, P = 0.03). These findings demonstrate that the sympathetic arterial baroreflex possesses two response curves for processing beat-to-beat diastolic pressure falls and rises. The falling pressure curve is rightward shifted, which reduces sensitivity to falling pressure at low absolute pressures. This demonstrates that the direction of the hysteresis is influenced by the prevailing pressure level relative to each baroreflex response curve.NEW & NOTEWORTHY The findings show that the arterial baroreflex processes diastolic pressure dependent on the direction of pressure change from the previous beat, yielding two distinct baroreflex response curves to falling and rising pressure. Overall, the falling pressure curve is rightward shifted and more sensitive. The rightward shift caused a hysteresis reversal at hypotensive pressures as the falling pressure saturation plateau of the sigmoid response curve occurred at higher pressures than the rising pressure curve.
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Affiliation(s)
- Anthony V Incognito
- Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.,NeuroV̇ASQ̇-Integrative Physiology Laboratory, Faculty of Physical Education, University of Brasília, Brasília, Distrito Federal, Brazil
| | - Milena Samora
- NeuroV̇ASQ̇-Integrative Physiology Laboratory, Faculty of Physical Education, University of Brasília, Brasília, Distrito Federal, Brazil
| | - Andrew D Shepherd
- Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Roberta A Cartafina
- NeuroV̇ASQ̇-Integrative Physiology Laboratory, Faculty of Physical Education, University of Brasília, Brasília, Distrito Federal, Brazil
| | | | - Mauricio Daher
- NeuroV̇ASQ̇-Integrative Physiology Laboratory, Faculty of Physical Education, University of Brasília, Brasília, Distrito Federal, Brazil
| | - Lauro C Vianna
- NeuroV̇ASQ̇-Integrative Physiology Laboratory, Faculty of Physical Education, University of Brasília, Brasília, Distrito Federal, Brazil
| | - Philip J Millar
- Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
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44
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Aimo A, Vergaro G, Castiglione V, Rapezzi C, Emdin M. Safety and Tolerability of Neurohormonal Antagonism in Cardiac Amyloidosis. Eur J Intern Med 2020; 80:66-72. [PMID: 32475765 DOI: 10.1016/j.ejim.2020.05.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/06/2020] [Accepted: 05/11/2020] [Indexed: 01/28/2023]
Abstract
BACKGROUND Drugs for neurohormonal antagonism are usually denied to patients with cardiac amyloidosis (CA) because of safety concerns. METHODS Patients diagnosed with CA at a tertiary referral centre from 2009 to 2019 were enrolled. In the absence of contraindications, beta-blockers, angiotensin converting enzyme inhibitors or angiotensin receptor blockers (ACEi/ARB), and mineralocorticoid receptor antagonists (MRA) were started or up-titrated. RESULTS 99 patients were evaluated (72% men, age 80 years [72,83], 33% light-chain and 67% transthyretin amyloidosis); 56% were started on or underwent up-titration of a beta-blocker, 25% of ACEi/ARB, and 39% of MRA; beta-blockers were then prescribed to 87% of patients, ACEi/ARB to 75%, and MRA to 63%, with median bisoprolol, ramipril, valsartan, and spironolactone daily equivalent doses of 2.5 mg, 5 mg, 80 mg, and 25 mg, respectively. Patients starting or starting/up-titrating a beta-blocker did not show a higher frequency of hypotension, fatigue, syncope, symptomatic bradycardia, need for pacemaker implantation, or HF hospitalization. Lower stroke volume and cardiac output (CO) predicted HF hospitalization regardless of amyloidosis type; lower left ventricular ejection fraction predicted hypotension, and lower CO and diastolic blood pressure predicted syncope. Patients who had an ACEi/ARB or MRA being started or up-titrated did not experience more adverse events than other patients. CONCLUSIONS ACEi/ARB and MRA can be safely used in CA, provided that no contraindications are present, treatment is started at a low dose and slowly up-titrated, and patients are monitored quite closely. Beta-blocker therapy is less tolerated in patients with AL amyloidosis and/or worse haemodynamic function.
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Affiliation(s)
- Alberto Aimo
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy.
| | - Giuseppe Vergaro
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy; Cardiology Division, Fondazione Toscana Gabriele Monasterio, Pisa, Italy
| | | | - Claudio Rapezzi
- Centro Cardiologico Universitario di Ferrara, University of Ferrara, Italy; Maria Cecilia Hospital, GVM Care & Research, Cotignola, Italy
| | - Michele Emdin
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy; Cardiology Division, Fondazione Toscana Gabriele Monasterio, Pisa, Italy
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45
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Abstract
Heart rate is a parameter that is very easy to measure and is widely used both in clinic and during daily life activities. Its value gained more relevance with the evidence, in prospective studies and meta-analysis, of association between elevated heart rate values and diseases and outcomes.The increased knowledge of physiological mechanisms of heart rate control and the pathophysiological mechanisms responsible for its dysfunction allows to identify the cut-off value of normalcy providing info for non-pharmacological and pharmacological treatments to reduce the cardiovascular risk both in general population and in pathophysiological conditions. This paper overviews the knowledges of the role of resting heart rate as predictor of cardiovascular risk.
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Affiliation(s)
- Gino Seravalle
- Department of Cardiology, Italian Auxological Institute S. Luca Hospital, Milan, Italy -
| | | | - Guido Grassi
- Department of Health Science, Milano-Bicocca University, Milan, Italy
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46
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Abstract
Heart rate is a parameter that is widely used by the general population as a marker of health. The availability of wearable electronic heart rate monitoring devices and use of specific apps are widely used both at rest and during daily life activities. Resting heart rate values gained more relevance with the evidence of association between elevated heart rate values at rest and diseases and adverse events. Also longitudinal studies demonstrated a clear association between increase in heart rate over time and cardiovascular and all-cause mortality. The increased knowledge of physiological mechanisms of heart rate control and the pathophysiological mechanisms responsible for its dysfunction allows identification of the cutoff value of normalcy. This information can be used to select non-pharmacological and pharmacological interventions to reduce the cardiovascular risk both in the general population and in patients with pathophysiological conditions. This review provides an overview of the current knowledge of resting heart rate as cardiovascular risk factor.
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Affiliation(s)
- Gino Seravalle
- Cardiology Department, S. Luca Hospital, Istituto Auxologico Italiano IRCCS , Milan, Italy
| | - Guido Grassi
- Clinica Medica, S. Gerardo Hospital, University Milano-Bicocca , Monza, Italy
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47
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Grassi G, Quarti-Trevano F, Esler MD. Sympathetic activation in congestive heart failure: an updated overview. Heart Fail Rev 2019; 26:173-182. [PMID: 31832833 DOI: 10.1007/s10741-019-09901-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Conclusive evidence demonstrates that the sympathetic nervous system activation is a hallmark of congestive heart failure. This has been shown via a variety of biochemical, neurophysiological, and neuroimaging approaches for studying human sympathetic neural function. The sympathetic activation appears to be an early phenomenon in the clinical course of the disease, closely related to its severity and potentiated by the concomitant presence of other comorbidities, such as obesity, diabetes mellitus, metabolic syndrome, hypertension, and renal failure. The adrenergic overdrive in heart failure is associated with other sympathetic abnormalities, such as the downregulation of beta-adrenergic adrenoreceptors at cardiac level, and exerts unfavorable consequences on the cardiovascular system. These include the endothelial dysfunction, the development of left ventricular hypertrophy, the atherosclerosis development, as well as the generation of atrial and ventricular arrhythmias, and, at very extreme levels of sympathetic activation, the occurrence of microscopic myocardial necrosis. Given the close direct independent relationships detected in heart failure between sympathetic activation and mortality, the adrenergic overdrive has become a target of neuromodulatory therapeutic interventions, which include non-pharmacological, pharmacological, and device-based interventions. For some of these approaches (specifically bilateral renal nerves ablation and carotid baroreceptor stimulation), additional studies are needed to better define their impact on the clinical course of the disease.
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Affiliation(s)
- Guido Grassi
- Clinica Medica, Department of Medicine and Surgery, University of Milano-Bicocca, Via Pergolesi 33, 20052, Monza, Italy.
| | - Fosca Quarti-Trevano
- Clinica Medica, Department of Medicine and Surgery, University of Milano-Bicocca, Via Pergolesi 33, 20052, Monza, Italy
| | - Murray D Esler
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
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48
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Fu Q, Ogoh S. Sex differences in baroreflex function in health and disease. J Physiol Sci 2019; 69:851-859. [PMID: 31721084 PMCID: PMC10717578 DOI: 10.1007/s12576-019-00727-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 10/29/2019] [Indexed: 01/16/2023]
Abstract
This brief review summarizes the current knowledge on sex differences in baroreflex function, with a major focus on studies in humans. It has been demonstrated that healthy women have blunted cardiovagal baroreflx sensitivity during a rapid (i.e., within seconds) hypertensive stimulus, but baroreflex sensitivity is similar between the sexes during a hypotensive stimulus. Normal aging decreases cardiovagal baroreflex sensitivity and the rate of decline is similar in men and women. Cardiovagal baroreflex sensitivity is reduced in pathological conditions such as hypertension and type II diabetes, and the reduction is greater in female patients than male patients. There is no clear sex difference in sympathetic baroreflex sensitivity among young individuals, however, with women of more advanced age, sympathetic baroreflex sensitivity decreases, which appears to be associated with greater arterial stiffness compared with similarly aged men. The blunted sympathetic baroreflex sensitivity in older women may predispose them to an increased prevalence of hypertension and cardiovascular disease.
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Affiliation(s)
- Qi Fu
- Women's Heart Health Laboratory, Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, 7232 Greenville Avenue, Suite 435, Dallas, TX, 75231, USA.
- The University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | - Shigehiko Ogoh
- Department of Biomedical Engineering, Toyo University, Tokyo, Japan
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