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Hamaoka T, Sinoway LI, Cui J. The role of peripheral venous distension reflex in regulating hemodynamics: mini review. Auton Neurosci 2024; 256:103217. [PMID: 39270515 DOI: 10.1016/j.autneu.2024.103217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 07/31/2024] [Accepted: 09/03/2024] [Indexed: 09/15/2024]
Abstract
Significant volume is pooled in veins in humans and the amount is dramatically altered by various physiological stresses and diseases. Several animal and human studies demonstrated that limb venous distension evoked significant increases in blood pressure and sympathetic nerve activity (venous distension reflex, VDR). VDR has attracted much attention because of its potential to explain the still unknown mechanism of autonomic dysfunction in several diseases, which would lead to a new treatment approach. This mini review discusses accumulated evidence of VDR at this point and what should be investigated in the future to apply the current understanding of VDR in clinical practice.
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Affiliation(s)
- Takuto Hamaoka
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033, United States of America
| | - Lawrence I Sinoway
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033, United States of America
| | - Jian Cui
- Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033, United States of America.
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Smith SJ, Smith BH, Sichlau MJ, Chen B, Knight D, Rowe PC. Nonpelvic comorbid symptoms of 45 patients with pain of pelvic venous origin, before and after treatment. Phlebology 2024:2683555241273109. [PMID: 39126670 DOI: 10.1177/02683555241273109] [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: 08/12/2024]
Abstract
OBJECTIVE To report the prevalence and severity of nonpelvic symptoms for patients with venous-origin chronic pelvic pain (VO-CPP) and to describe outcomes after pelvic vein stenting and embolization. METHODS We retrospectively reviewed outcomes of 45 women with VO-CPP who underwent treatment with iliac vein stenting and/or embolization. Patients completed symptom-severity questionnaires before and after treatment that assessed for pelvic pain, and multiple other symptoms, including brain fog, anxiety, depression, musculoskeletal pain, fatigue, migraines and more. RESULTS Patient age ranged from 18 to 65 years. The prevalence of common symptoms was as follows: migraines, 69%; brain fog, 76%; anxiety attacks, 58%; excess sweating, 64%; hip pain, 73%; diarrhea, 62%; constipation, 76%; and abdominal bloating, 82%. After treatment, most symptom scores improved by more than 50%; exceptions were excessive sweating (41% improvement) and bloating (47% improvement). Prevalence of individual symptoms that bundle into POTS ranged from 29% to 76%, where symptom improvement ranged from 23% to 59% after treatment. Overlapping individual symptoms characteristic of fibromyalgia and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) were present in 64% to 82% of patients and all improved by 49% to 63% after treatment. CONCLUSIONS Pelvic venous flow abnormality is linked causally to a spectrum of interrelated symptoms, of which many can be bundled into named syndromes of unknown cause. With catheter- based treatment of pelvic venous pooling, nonpelvic symptom and syndrome scores improved.
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Affiliation(s)
- Steven J Smith
- Vascular and Interventional Professionals, Hinsdale, IL, USA
| | - B Holly Smith
- Center for the Advanced Study of Human Paleobiology, George Washington University, Washington, DC, USA
- Museum of Anthropological Archaeology, University of Michigan, Ann Arbor, MI, USA
| | | | - Brenda Chen
- College of Osteopathic Medicine, Touro University California, Vallejo, CA, USA
| | - Dacre Knight
- Division of General Internal Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - Peter C Rowe
- Department of Pediatrics, Johns Hopkins University, Baltimore, MD, USA
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3
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Smith SJ, Sichlau MJ, Smith BH, Knight DR, Chen B, Rowe PC. Improvement in chronic pelvic pain, orthostatic intolerance and interstitial cystitis symptoms after treatment of pelvic vein insufficiency. Phlebology 2024; 39:202-213. [PMID: 38050791 DOI: 10.1177/02683555231219737] [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: 12/06/2023]
Abstract
OBJECTIVES Comorbidities associated with venous origin chronic pelvic pain (VO-CPP) were evaluated pre and post venous treatment to assess change. MATERIALS AND METHODS 45 women with VO-CPP were treated with venous stenting and/or embolization. Four surveys assessed symptoms pre- and post-treatment: IPPS (chronic pelvic pain), PUF (interstitial cystitis), OHQ (dysautonomia), and modified ROME III (IBS). Prevalence of joint hypermobility was investigated. RESULTS Ages were 18-65. Pretreatment, 64% and 49% of women were in the severe range for PUF and OHQ, respectively. 40% and 56% met criteria for IBS and Ehlers-Danlos syndrome/Hypermobility Spectrum Disorder (EDS/HSD), respectively. 17eceived an iliac stent, 5 pelvic embolization, and 23 both. Post-treatment, average scores improved: IPPS (by 55%), PUF (34%), and OHQ (49%). Rome III improved only slightly. CONCLUSION Pelvic pain, interstitial cystitis, and dysautonomia were frequently found with VO-CPP and improved after venous treatment. EDS/HSD and IBS were common in these women.
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Affiliation(s)
- Steven J Smith
- Vascular and Interventional Professionals, LLC, Chicago, IL, USA
| | - Michael J Sichlau
- Department of Interventional Radiology, Vascular and Interventional Professionals, Hinsdale, IL, USA
| | - B Holly Smith
- Center for the Advanced Study of Human Paleobiology, George Washington University, Washington, DC, USA
| | - Dacre Rt Knight
- Department of General Internal Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - Brenda Chen
- Touro University California College of Osteopathic Medicine, Vallejo, CA, USA
| | - Peter C Rowe
- The Johns Hopkins University, Baltimore, MD, USA
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Herlekar SS, Doyizode AR, Siddangoudra SP, Anupama V. Cardiovascular Reflexes - Vagus as the Key Player. Curr Cardiol Rev 2024; 20:e290424229476. [PMID: 38685784 PMCID: PMC11337609 DOI: 10.2174/011573403x284831240408053528] [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: 11/06/2023] [Revised: 01/18/2024] [Accepted: 02/13/2024] [Indexed: 05/02/2024] Open
Abstract
The cardiac and vascular systems work in coordination by activating various reflex mechanisms based on the body's needs. These may be during physiological variations or pathophysiological changes seen in disease conditions of varying degrees of severity. This article intends to explain various reflexes involved in the homeostasis of the cardiovascular system and the role of vagus as the key component in all these reflexes. The article also explains the components of the reflex arc, the stimulus and response, and the role of reflex in a few diseases. This article describes 22 different cardiovascular reflexes in detail.
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Affiliation(s)
| | - Ashwini R. Doyizode
- Department of Physiology, SDM College of Medical Sciences and Hospital, Dharwad, Karnataka, India
| | | | - V. Anupama
- Department of Physiology, J N Medical College, Belagavi, Karnataka, India
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Leach OK, Gifford JR, Mack GW. Rapid onset vasodilation during baroreceptor loading and unloading. Am J Physiol Regul Integr Comp Physiol 2023; 325:R568-R575. [PMID: 37694334 DOI: 10.1152/ajpregu.00116.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/21/2023] [Accepted: 09/05/2023] [Indexed: 09/12/2023]
Abstract
The purpose of these experiments was to determine if the increase in vascular conductance following a single muscle contraction (50% of maximal voluntary contraction) (6 male and 6 female subjects) was altered during baroceptor loading and unloading. Rapid onset vasodilation (ROV) was determined by measuring brachial artery blood flow (Doppler ultrasound) and blood pressure (Finapress monitor). Brachial artery vascular conductance was calculated by dividing blood flow by mean arterial pressure. ROV was described by the area under the Δvascular conductance (VC)-time curve during the 30 s following muscle contraction. ROV was determined using chamber pressures of +20, +10, 0, -10, -20, and -40 mmHg (lower body positive and negative pressure, LBPP, and LBNP). We tested the hypothesis that the impact of baroreceptor loading and unloading produces a proportion change in ROV. The level of ROV following each contraction was proportional to the peak force (r2 = 0.393, P = 0.0001). Peak force was therefore used as a covariate in further analysis. ROV during application of -40 mmHg LBNP (0.345 ± 0.229 mL·mmHg-1) was lower than that observed at Control (0.532 ± 0.284 mL·mmHg-1, P = 0.034) and +20 mmHg LBPP (0.658 ± 0.364 mL·mmHg-1, P = 0.0008). ROV was linearly related to chamber pressure from -40 to +20 mmHg chamber pressure (r2 = 0.512, P = 0.022, n = 69) and from -20 to +10 mmHg chamber pressure (r2= 0.973, P < 0.0425, n = 45), Overall, vasoconstrictor tone altered with physiologically relevant baroreceptor loading and unloading resulted in a proportion change in ROV.NEW & NOTEWORTHY Rapid onset vasodilation (ROV) was linearly related to the peak force of each single 1-s muscle contraction. In addition, ROV is reduced by baroreceptor unloading (LBNP: -10, -120, and -40 mmHg) and increased by baroreceptor loading (LBPP: +10 and +20 mmHg). Without accounting for peak force and the level of baroreceptor engagement makes comparison of ROV in subjects of differing muscle size or strength untenable.
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Affiliation(s)
- Olivia K Leach
- Department of Exercise Sciences, Brigham Young University, Provo, Utah, United States
| | - Jayson R Gifford
- Department of Exercise Sciences, Brigham Young University, Provo, Utah, United States
| | - Gary W Mack
- Department of Exercise Sciences, Brigham Young University, Provo, Utah, United States
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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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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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Cui J, Blaha C, Leuenberger UA, Sinoway LI. Sympathetic activation due to limb venous distension is preserved during muscle metaboreceptor stimulation. Am J Physiol Regul Integr Comp Physiol 2021; 321:R21-R28. [PMID: 33978490 DOI: 10.1152/ajpregu.00305.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Venous saline infusions in an arterially occluded forearm evoke reflex increases in muscle sympathetic nerve activity (MSNA) and blood pressure (BP) in humans (venous distension reflex). It is unclear if the inputs from metabolically sensitive skeletal muscle afferents (i.e., muscle metaboreflex) would modify the venous distension reflex. We hypothesized that muscle metaboreceptor stimulation might augment the venous distension reflex. BP (Finapres), heart rate (ECG), and MSNA (microneurography) were assessed in 18 young healthy subjects. In trial A, saline (5% forearm volume) was infused into the veins of an arterially occluded arm (nonhandgrip trial). In trial B, subjects performed 2-min static handgrip followed by postexercise circulatory occlusion (PECO) of the arm. During PECO, saline was infused into the veins of the arm (handgrip trial). In trial A, the infusion increased MSNA and BP as expected (both P < 0.001). In trial B, handgrip significantly raised MSNA, BP, and venous lactic acid concentrations. Venous saline infusion during PECO further raised MSNA and BP (both P < 0.001). The changes in MSNA (Δ8.6 ± 1.5 to Δ10.6 ± 1.8 bursts/min, P = 0.258) and mean arterial pressure (P = 0.844) evoked by the infusion during PECO were not significantly different from those in the nonhandgrip trial. These observations indicate that venous distension reflex responses are preserved during sympathetic activation mediated by the muscle metaboreflex.
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Affiliation(s)
- Jian Cui
- Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Cheryl Blaha
- Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Urs A Leuenberger
- Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Lawrence I Sinoway
- Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
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9
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Venous Pulse Wave Velocity variation in response to a simulated fluid challenge in healthy subjects. Biomed Signal Process Control 2021. [DOI: 10.1016/j.bspc.2020.102177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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10
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Manavi T, Vazquez P, O'Grady H, Martina J, Rose M, Nielsen D, Fitzpatrick D, Forouzan O, Nagy M, Sharif F, Zafar H. A novel wireless implant for central venous pressure measurement: First animal experience. CARDIOVASCULAR DIGITAL HEALTH JOURNAL 2020; 1:130-138. [PMID: 35265885 PMCID: PMC8890339 DOI: 10.1016/j.cvdhj.2020.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/30/2022] Open
Abstract
Background/Objective Central venous pressure (CVP) serves as a surrogate for right atrial pressure, and thus could potentially predict a wider range of heart failure conditions. The purpose of this work is to assess CVP, through an implantable sensor incorporated with a novel anchor design, in the inferior and superior vena cava of an animal model. Methods Two animals (Dorset sheep) were implanted with sensors at 3 different locations: inferior vena cava (IVC), superior vena cava (SVC), and pulmonary artery (PA). Two sensors with distinct anchor designs considering anatomical requirements were used. A standard PA sensor (trade name Cordella) was deployed in the PA and SVC, whereas a sensor with a modified cylindrical anchor with various struts was designed to reside in the IVC. Each implant was calibrated against a Millar catheter reference sensor. The ability of the central venous sensors to detect changes in pressure was evaluated by modifying the fluid volume of the animal. Results The sensors implanted in both sheep were successful, which provided an opportunity to understand the relationship between PA and CVP via simultaneous readings. The mapping and implantation in the IVC took less than 15 minutes. Multiple readings were taken at each implant location using a hand-held reader device under various conditions. CVP recorded in the IVC (6.49 mm Hg) and SVC (6.14 mm Hg) were nearly the same. PA pressure (13-14 mm Hg) measured was higher than CVP, as expected. The SVC waveforms showed clear beats and respiration. Respiration could be seen in the IVC waveforms, but not all beats were easily distinguishable. Both SVC and IVC readings showed increases in pressure (3.7 and 2.7 mm Hg for SVC and IVC, respectively) after fluid overload was induced via extra saline administration. Conclusion In this work, the feasibility of measuring CVP noninvasively was demonstrated. The established ability of wireless PA pressure sensors to enable prevention of decompensation events weeks ahead can now be explored using central venous versions of such sensors.
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Affiliation(s)
- Tejaswini Manavi
- Cardiovascular Research & Innovation Centre, National University of Ireland Galway, Galway, Ireland.,Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | - Patricia Vazquez
- Cardiovascular Research & Innovation Centre, National University of Ireland Galway, Galway, Ireland.,Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | - Helen O'Grady
- Cardiovascular Research & Innovation Centre, National University of Ireland Galway, Galway, Ireland.,Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | | | | | | | | | | | | | - Faisal Sharif
- Cardiovascular Research & Innovation Centre, National University of Ireland Galway, Galway, Ireland.,Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, Galway, Ireland.,BioInnovate Ireland, Galway, Ireland.,Department of Cardiology, University Hospital Galway, Galway, Ireland.,CÚRAM-SFI Centre for Research in Medical Devices, Galway, Ireland
| | - Haroon Zafar
- Cardiovascular Research & Innovation Centre, National University of Ireland Galway, Galway, Ireland.,Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, Galway, Ireland.,BioInnovate Ireland, Galway, Ireland
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11
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Cui J, Blaha C, Herr MD, Sinoway LI. Lower-limb venous distension reflex and orthostatic tolerance in young healthy humans. Am J Physiol Regul Integr Comp Physiol 2020; 319:R142-R147. [PMID: 32663039 DOI: 10.1152/ajpregu.00269.2019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Earlier reports suggest that limb venous distension evokes reflex increases in muscle sympathetic nerve activity (MSNA) and blood pressure (BP) (i.e., venous distension reflex). Our recent report also shows that suction of arterially occluded limb evokes venous distension reflex. We postulate that the venous distension reflex contributes to autonomic responses to orthostatic stress. In this study, we hypothesized that orthostatic tolerance would be linked to the MSNA response seen with lower limb suction. Fifteen healthy subjects were tested in the supine position. Negative pressure (-100 mmHg) was applied on an arterially occluded lower limb for 2 min. MSNA from the peroneal nerve in the limb not exposed to suction, ECG, and BP (Finometer) was recorded throughout the study. Limb occlusion without suction was used as a control trial. In a separate visit, the individual's orthostatic tolerance was assessed using a graded lower body negative pressure (LBNP) tolerance test. Mean arterial BP and MSNA (18.6 ± 1.9 to 23.6 ± 2.0 bursts/min) significantly (both P < 0.05) increased during limb suction. Orthostatic tolerance index positively correlated (R = 0.636, P = 0.011) with the MSNA response seen with suction during occlusion. Since the venous distension reflex strength correlates with the level of orthostatic tolerance, we speculate that lower-limb venous distension reflex engagement increases the sympathetic responses during orthostatic challenge and serves to maintain BP with postural stress.
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Affiliation(s)
- Jian Cui
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Cheryl Blaha
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Michael D Herr
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Lawrence I Sinoway
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
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KRUSE NICHOLAST, HUGHES WILLIAME, BENZO ROBERTOM, CARR LUCASJ, CASEY DARRENP. Workplace Strategies to Prevent Sitting-induced Endothelial Dysfunction. Med Sci Sports Exerc 2018; 50:801-808. [DOI: 10.1249/mss.0000000000001484] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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13
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Bistola V, Polyzogopoulou E, Ikonomidis I, Parissis J. Congestion in acute heart failure with reduced vs. preserved left ventricular ejection fraction: differences, similarities and remaining gaps. Eur J Heart Fail 2017; 20:748-750. [PMID: 29251810 DOI: 10.1002/ejhf.1115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 11/18/2017] [Accepted: 11/20/2017] [Indexed: 12/11/2022] Open
Affiliation(s)
- Vasiliki Bistola
- Heart Failure Unit, Department of Cardiology, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Eftihia Polyzogopoulou
- Emergency Medicine Department, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Ignatios Ikonomidis
- Heart Failure Unit, Department of Cardiology, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - John Parissis
- Heart Failure Unit, Department of Cardiology, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece.,Emergency Medicine Department, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
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Matthews EL, Brian MS, Coyle DE, Edwards DG, Stocker SD, Wenner MM, Farquhar WB. Peripheral venous distension elicits a blood pressure raising reflex in young and middle-aged adults. Am J Physiol Regul Integr Comp Physiol 2016; 310:R1128-33. [PMID: 27053648 DOI: 10.1152/ajpregu.00438.2015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 03/31/2016] [Indexed: 11/22/2022]
Abstract
Distension of peripheral veins in humans elicits a pressor and sympathoexcitatory response that is mediated through group III/IV skeletal muscle afferents. There is some evidence that autonomic reflexes mediated by these sensory fibers are blunted with increasing age, yet to date the venous distension reflex has only been studied in young adults. Therefore, we tested the hypothesis that the venous distension reflex would be attenuated in middle-aged compared with young adults. Nineteen young (14 men/5 women, 25 ± 1 yr) and 13 middle-aged (9 men/4 women, 50 ± 2 yr) healthy normotensive participants underwent venous distension via saline infusion through a retrograde intravenous catheter in an antecubital vein during limb occlusion. Beat-by-beat blood pressure, muscle sympathetic nerve activity (MSNA), and model flow-derived cardiac output (Q), and total peripheral resistance (TPR) were recorded throughout the trial. Mean arterial pressure (MAP) increased during the venous distension in both young (baseline 83 ± 2, peak 94 ± 3 mmHg; P < 0.05) and middle-aged adults (baseline 88 ± 2, peak 103 ± 3 mmHg; P < 0.05). MSNA also increased in both groups [young: baseline 886 ± 143, peak 1,961 ± 242 arbitrary units (AU)/min; middle-aged: baseline 1,164 ± 225, peak 2,515 ± 404 AU/min; both P < 0.05]. TPR (P < 0.001), but not Q (P = 0.76), increased during the trial. However, the observed increases in blood pressure, MSNA, and TPR were similar between young and middle-aged adults. Additionally, no correlation was found between age and the response to venous distension (all P > 0.05). These findings suggest that peripheral venous distension elicits a pressor and sympathetic response in middle-aged adults similar to the response observed in young adults.
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Affiliation(s)
- Evan L Matthews
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware; and
| | - Michael S Brian
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware; and
| | - Dana E Coyle
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware; and
| | - David G Edwards
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware; and
| | - Sean D Stocker
- Departments of Physiology and Neural and Behavioral Sciences, Pennsylvania State University College of Medicine, Hershey, Pennsylvania
| | - Megan M Wenner
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware; and
| | - William B Farquhar
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, Delaware; and
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15
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Colombo PC, Doran AC, Onat D, Wong KY, Ahmad M, Sabbah HN, Demmer RT. Venous congestion, endothelial and neurohormonal activation in acute decompensated heart failure: cause or effect? Curr Heart Fail Rep 2016; 12:215-22. [PMID: 25740404 DOI: 10.1007/s11897-015-0254-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Venous congestion and endothelial and neurohormonal activation are known to occur in acute decompensated heart failure (ADHF), yet the temporal role of these processes in the pathophysiology of decompensation is not fully understood. Conventional wisdom presumes congestion to be a consequence of worsening cardiovascular function; however, the biomechanically driven effects of venous congestion are biologically plausible contributors to ADHF that remain largely unexplored in vivo. Recent experimental evidence from human models suggests that fluid accumulation and venous congestion are not simply consequences of poor cardiovascular function, but rather are fundamental pro-oxidant, pro-inflammatory, and hemodynamic stimuli that contribute to acute decompensation. The latest advances in the monitoring of volume status using implantable devices allow for the detection of venous congestion before symptoms arise. This may ultimately lead to improved treatment strategies including not only diuretics, but also specific, adjuvant interventions to counteract endothelial and neurohormonal activation during early preclinical decompensation.
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Affiliation(s)
- Paolo C Colombo
- Division of Cardiology, College of Physicians & Surgeons, Department of Medicine, Columbia University, 622 West 168th Street, PH 12-134, New York, NY, 10032, USA,
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16
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Cui J, Muller MD, Blaha C, Kunselman AR, Sinoway LI. Seasonal variation in muscle sympathetic nerve activity. Physiol Rep 2015; 3:3/8/e12492. [PMID: 26265752 PMCID: PMC4562578 DOI: 10.14814/phy2.12492] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Epidemiologic data suggest there are seasonal variations in the incidence of severe cardiac events with peak levels being evident in the winter. Whether autonomic indices including muscle sympathetic nerve activity (MSNA) vary with season remains unclear. In this report, we tested the hypothesis that resting MSNA varies with the seasons of the year with peak levels evident in the winter. We analyzed the supine resting MSNA in 60 healthy subjects. Each subject was studied during two, three, or four seasons (total 237 visits). MSNA burst rate in the winter (21.0 ± 6.8 burst/min, mean ± SD) was significantly greater than in the summer (13.5 ± 5.8 burst/min, P < 0.001), the spring (17.1 ± 9.0 burst/min, P = 0.03), and the fall (17.9 ± 7.7 burst/min, P = 0.002). There was no significant difference in MSNA for other seasonal comparisons. The results suggest that resting sympathetic nerve activity varies along the seasons, with peak levels evident in the winter. We speculate that the seasonal changes in sympathetic activity may be a contribution to the previously observed seasonal variations in cardiovascular morbidity and mortality.
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Affiliation(s)
- Jian Cui
- Penn State Hershey Heart and Vascular Institute, Pennsylvania State University College of Medicine Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Matthew D Muller
- Penn State Hershey Heart and Vascular Institute, Pennsylvania State University College of Medicine Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Cheryl Blaha
- Penn State Hershey Heart and Vascular Institute, Pennsylvania State University College of Medicine Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Allen R Kunselman
- Division of Biostatistics and Bioinformatics, Department of Public Health Sciences, Pennsylvania State University College of Medicine Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Lawrence I Sinoway
- Penn State Hershey Heart and Vascular Institute, Pennsylvania State University College of Medicine Milton S. Hershey Medical Center, Hershey, Pennsylvania
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17
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Cui J, Blaha C, Herr MD, Drew RC, Muller MD, Sinoway LI. Limb suction evoked during arterial occlusion causes systemic sympathetic activity in humans. Am J Physiol Regul Integr Comp Physiol 2015; 309:R482-8. [PMID: 26136530 DOI: 10.1152/ajpregu.00117.2015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/29/2015] [Indexed: 12/30/2022]
Abstract
Venous saline infusions in an arterially occluded forearm evokes reflex increases in muscle sympathetic nerve activity (MSNA) and blood pressure (BP). We hypothesized that the application of suction to the human limbs would activate this venous distension reflex and raise sympathetic outflow. We placed airtight pressure tanks and applied 100 mmHg negative pressure to an arterially occluded limb (occlusion and suction, O&S) to induce tissue deformation without fluid translocation. BP, heart rate (HR), and MSNA were assessed in 19 healthy subjects during 2 min of arm or leg O&S. Occlusion without suction served as a control. During a separate visit, saline (5% forearm volume) was infused into veins of the arterially occluded arm (n = 13). The O&S increased limb circumference, MSNA burst rate (arm: Δ6.7 ± 0.7; leg: Δ6.8 ± 0.7 bursts/min), and total activity (arm: Δ199 ± 14; leg: Δ172 ± 22 units/min) and BP (arm: Δ4.3 ± 0.3; leg: Δ9.4 ± 1.4 mmHg) from the baseline. The MSNA and BP responses during arm O&S correlated with those during leg O&S. Occlusion alone had no effect on MSNA and BP. MSNA (r = 0.607) responses during arm O&S correlated with those evoked by the saline infusion into the arm. These correlations suggest that sympathetic activation during limb O&S is likely, at least partially, to be evoked via the venous distension reflex. These data suggest that suction of an occluded limb evokes sympathetic activation and that the limb venous distension reflex exists in arms and legs of normal humans.
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Affiliation(s)
- Jian Cui
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Cheryl Blaha
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Michael D Herr
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Rachel C Drew
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Matthew D Muller
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - Lawrence I Sinoway
- Pennsylvania State University College of Medicine, Penn State Hershey Heart and Vascular Institute, Milton S. Hershey Medical Center, Hershey, Pennsylvania
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18
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Pfeiffer ER, Tangney JR, Omens JH, McCulloch AD. Biomechanics of cardiac electromechanical coupling and mechanoelectric feedback. J Biomech Eng 2014; 136:021007. [PMID: 24337452 DOI: 10.1115/1.4026221] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 12/12/2013] [Indexed: 11/08/2022]
Abstract
Cardiac mechanical contraction is triggered by electrical activation via an intracellular calcium-dependent process known as excitation-contraction coupling. Dysregulation of cardiac myocyte intracellular calcium handling is a common feature of heart failure. At the organ scale, electrical dyssynchrony leads to mechanical alterations and exacerbates pump dysfunction in heart failure. A reverse coupling between cardiac mechanics and electrophysiology is also well established. It is commonly referred as cardiac mechanoelectric feedback and thought to be an important contributor to the increased risk of arrhythmia during pathological conditions that alter regional cardiac wall mechanics, including heart failure. At the cellular scale, most investigations of myocyte mechanoelectric feedback have focused on the roles of stretch-activated ion channels, though mechanisms that are independent of ionic currents have also been described. Here we review excitation-contraction coupling and mechanoelectric feedback at the cellular and organ scales, and we identify the need for new multicellular tissue-scale model systems and experiments that can help us to obtain a better understanding of how interactions between electrophysiological and mechanical processes at the cell scale affect ventricular electromechanical interactions at the organ scale in the normal and diseased heart.
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19
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Harada D, Asanoi H, Takagawa J, Ishise H, Ueno H, Oda Y, Goso Y, Joho S, Inoue H. Slow and deep respiration suppresses steady-state sympathetic nerve activity in patients with chronic heart failure: from modeling to clinical application. Am J Physiol Heart Circ Physiol 2014; 307:H1159-68. [DOI: 10.1152/ajpheart.00109.2014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Influences of slow and deep respiration on steady-state sympathetic nerve activity remain controversial in humans and could vary depending on disease conditions and basal sympathetic nerve activity. To elucidate the respiratory modulation of steady-state sympathetic nerve activity, we modeled the dynamic nature of the relationship between lung inflation and muscle sympathetic nerve activity (MSNA) in 11 heart failure patients with exaggerated sympathetic outflow at rest. An autoregressive exogenous input model was utilized to simulate entire responses of MSNA to variable respiratory patterns. In another 18 patients, we determined the influence of increasing tidal volume and slowing respiratory frequency on MSNA; 10 patients underwent a 15-min device-guided slow respiration and the remaining 8 had no respiratory modification. The model predicted that a 1-liter, step increase of lung volume decreased MSNA dynamically; its nadir (−33 ± 22%) occurred at 2.4 s; and steady-state decrease (−15 ± 5%), at 6 s. Actually, in patients with the device-guided slow and deep respiration, respiratory frequency effectively fell from 16.4 ± 3.9 to 6.7 ± 2.8/min ( P < 0.0001) with a concomitant increase in tidal volume from 499 ± 206 to 1,177 ± 497 ml ( P < 0.001). Consequently, steady-state MSNA was decreased by 31% ( P < 0.005). In patients without respiratory modulation, there were no significant changes in respiratory frequency, tidal volume, and steady-state MSNA. Thus slow and deep respiration suppresses steady-state sympathetic nerve activity in patients with high levels of resting sympathetic tone as in heart failure.
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Affiliation(s)
- Daisuke Harada
- The Cardiology Division, Imizu City Hospital, Imizu City, Toyama, Japan; and
| | - Hidetsugu Asanoi
- The Cardiology Division, Imizu City Hospital, Imizu City, Toyama, Japan; and
| | - Junya Takagawa
- The Cardiology Division, Imizu City Hospital, Imizu City, Toyama, Japan; and
| | - Hisanari Ishise
- The Cardiology Division, Imizu City Hospital, Imizu City, Toyama, Japan; and
| | - Hiroshi Ueno
- The Cardiology Division, Imizu City Hospital, Imizu City, Toyama, Japan; and
| | - Yoshitaka Oda
- The Cardiology Division, Toyama University Hospital, Toyama City, Toyama, Japan
| | - Yukiko Goso
- The Cardiology Division, Toyama University Hospital, Toyama City, Toyama, Japan
| | - Shuji Joho
- The Cardiology Division, Toyama University Hospital, Toyama City, Toyama, Japan
| | - Hiroshi Inoue
- The Cardiology Division, Toyama University Hospital, Toyama City, Toyama, Japan
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