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Colunga A, Carlson B, Olufsen MS. The importance of incorporating ventricular-ventricular interaction (VVI) in the study of pulmonary hypertension. Math Biosci 2024:109242. [PMID: 38944112 DOI: 10.1016/j.mbs.2024.109242] [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: 02/01/2024] [Revised: 06/18/2024] [Accepted: 06/22/2024] [Indexed: 07/01/2024]
Abstract
Ventricular ventricular interaction (VVI) affects blood volume and pressure in the right and left ventricles of the heart due to the location and balance of forces on the septal wall separating the ventricles. In healthy patients, the pressure of the left ventricle is considerably higher than the right, resulting in a septal wall that bows into the right ventricle. However, in patients with pulmonary hypertension, the pressure in the right ventricle increases significantly to a point where the pressure is similar to or surpasses that of the left ventricle during portions of the cardiac cycle. For these patients, the septal wall deviates towards the left ventricle, impacting its function. It is possible to study this effect using mathematical modeling, but existing models are nonlinear, leading to a system of algebraic differential equations that can be challenging to solve in patient-specific optimizations of clinical data. This study demonstrates that a simplified linearized model is sufficient to account for the effect of VVI and that, as expected, the impact is significantly more pronounced in patients with pulmonary hypertension.
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Affiliation(s)
- Amanda Colunga
- North Carolina State University, 2311 Stinson Drive, Raleigh, 27695, NC, USA
| | - Brian Carlson
- University of Michigan, 2800 Plymouth Rd, Ann Arbor, 48105, MI, USA
| | - Mette S Olufsen
- North Carolina State University, 2311 Stinson Drive, Raleigh, 27695, NC, USA.
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Sato S, Ito T, Tabata T, Ogawa A, Saiki A, Shimizu K. Effect of balloon pulmonary angioplasty on cardio-ankle vascular index and biventricular remodeling in patients with chronic thromboembolic pulmonary hypertension. Front Cardiovasc Med 2023; 10:1325846. [PMID: 38107257 PMCID: PMC10722157 DOI: 10.3389/fcvm.2023.1325846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 11/20/2023] [Indexed: 12/19/2023] Open
Abstract
Background Chronic thromboembolic pulmonary hypertension (CTEPH) is caused by organized pulmonary thrombi, and pulmonary endarterectomy is the only curative treatment. Since balloon pulmonary angioplasty (BPA) has become an established therapeutic option for inoperable CTEPH, prognosis has improved. Recent reports suggest that arterial stiffness evaluated using the cardio-ankle vascular index (CAVI) may play an important role in the cardio-vascular interaction in CTEPH; however, the details remain unclear. This study aimed to clarify the role of CAVI in CTEPH through hemodynamic changes and ventricular remodeling after BPA. Methods and results A total of 23 patients with CTEPH who had undergone BPA were enrolled in this study. The mean pulmonary artery pressure (mPAP) and CAVI significantly decreased after BPA [mPAP, 34 (26-45) mmHg to 20 (19-24) mmHg, p < 0.0001; CAVI, 9.4 (8.0-10.3) to 8.3 (7.5-9.6), p = 0.004]. The echocardiographic right ventricle was significantly decreased, and the left ventricular volume was significantly increased after BPA, indicating significant biventricular remodeling after BPA. Changes in CAVI (ΔCAVI) significantly correlated with changes in mPAP (r = 0.45, p = 0.03). Additionally, ΔCAVI was significantly correlated with changes in both right ventricular area and left ventricular volume. Conclusions Arterial stiffness, evaluated using the CAVI, improved after BPA. Changes in CAVI were significantly correlated with changes in pulmonary arterial pressure and biventricular remodeling. CAVI may play an important role in cardiovascular interactions in patients with CTEPH.
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Affiliation(s)
- Shuji Sato
- Division of Cardiology, Department of Internal Medicine, Toho University Sakura Medical Center, Chiba, Japan
| | - Takuro Ito
- Division of Cardiology, Department of Internal Medicine, Toho University Sakura Medical Center, Chiba, Japan
| | - Tsuyoshi Tabata
- Department of Clinical Functional Physiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Akihiro Ogawa
- Department of Rehabilitation, Toho University Sakura Medical Center, Chiba, Japan
| | - Atsuhito Saiki
- Center of Diabetes, Endocrine and Metabolism, Toho University Sakura Medical Center, Chiba, Japan
| | - Kazuhiro Shimizu
- Division of Cardiology, Department of Internal Medicine, Toho University Sakura Medical Center, Chiba, Japan
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Volkova E, Procell L, Kong L, Santhanam L, Gerecht S. Vascular stiffening in aging females with a hypertension-induced HIF2A gain-of-function mutation. Bioeng Transl Med 2023; 8:e10403. [PMID: 36925716 PMCID: PMC10013765 DOI: 10.1002/btm2.10403] [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: 05/26/2022] [Revised: 08/23/2022] [Accepted: 08/28/2022] [Indexed: 11/09/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is more prevalent in females than males; the causes of this sex difference have not been adequately explored. Gain-of-function (GOF) mutations in hypoxia-inducible factor 2α (HIF2A) lead to PAH and thrombotic consequences in patients and mice. Additionally, multiple emerging studies suggest that elevated systemic arterial stiffening (SAS) occurs in PAH; this could have critical prognostic value. Here, we utilized a HIF2A GOF mouse model to determine how SAS can be used as a prognosticator in sex-divergent PAH. We analyzed survival, vascular mechanics, and vascular phenotypes in young adult (8-16 weeks) and middle age (9-12 months) Hif2a GOF mice. We find that Hif2a heterozygous (HT) female mice, but not Hif2a HT male mice, exhibit poor survival, SAS upon aging, and decreased ability to withstand repeated physiological strain. Hif2a HT female mice also display thickening of the adventitial intima and increased collagen I and collagen III in all layers of the thoracic aorta. Our findings demonstrate differing PAH progression in female and male Hif2a GOF mice. Specifically, alterations in extracellular matrix (ECM) content led to vascular stiffening in aged females, resulting in poor survival. Moreover, we show that SAS emerges early in mice with PAH by coupling studies of vascular mechanics and analyzing vascular structure and composition. Importantly, we present a model for assessing sex differences in hereditary PAH progression and sex-specific prognosis, proposing that aortic stiffening can be used to prognosticate future poor outcomes in PAH.
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Affiliation(s)
- Eugenia Volkova
- Department of Chemical and Biomolecular EngineeringJohns Hopkins UniversityBaltimoreMarylandUSA
- Institute for NanoBioTechnology, Johns Hopkins UniversityBaltimoreMarylandUSA
| | - Linda Procell
- Department of Chemical and Biomolecular EngineeringJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Lingyang Kong
- Department of Chemical and Biomolecular EngineeringJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Lakshmi Santhanam
- Department of Chemical and Biomolecular EngineeringJohns Hopkins UniversityBaltimoreMarylandUSA
- Department of Anesthesiology and Critical Care MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
- Department of Biomedical EngineeringJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Sharon Gerecht
- Department of Chemical and Biomolecular EngineeringJohns Hopkins UniversityBaltimoreMarylandUSA
- Institute for NanoBioTechnology, Johns Hopkins UniversityBaltimoreMarylandUSA
- Department of Biomedical EngineeringJohns Hopkins University School of MedicineBaltimoreMarylandUSA
- Department of Biomedical EngineeringDuke UniversityDurhamNorth CarolinaUSA
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Radchenko GD, Botsiuk YA, Sirenko YM. Ventricular Function and Cardio-Ankle Vascular Index in Patients With Pulmonary Artery Hypertension. Vasc Health Risk Manag 2022; 18:889-904. [PMID: 36597509 PMCID: PMC9805732 DOI: 10.2147/vhrm.s385536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/18/2022] [Indexed: 12/29/2022] Open
Abstract
Aim This study aims to evaluate the left ventricle (LV) systolic and diastolic function in patients with idiopathic pulmonary arterial hypertension (IPAH) and its correlation with systemic arterial stiffness assessed by cardio-ankle vascular index (CAVI). Patient and methods We included 37 patients with IPAH and 20 healthy people matched by age. All patients were assessed: vital signs, 6-minute walk test, NT-proBNP level, the CAVI, the right ventricular (RV) and LV function parameters, including ejection time (ET), tissue speckle-tracking values - global longitudinal strain (GLS) and strain rate (SR). Results The groups were matched by age, gender, BMI, office SBP and DBP. Patients with IPAH had higher heart rate, NT-proBNP level and lower ferritin level, GFR (CKD-EPI), SaO2 than healthy people. The mean CAVIleft was higher in IPAH patients than in the control group- 8.7±1.1 vs 7.5±0.9, P=0.007. Healthy people had significantly less E/e' and lower IVRT. LVET and RVET were shorter in IPAH patients. Patients with IPAH had mean LVGLS -(-17.6±4.8%) and 35.1% of them were with LVGLS ≤16% compared to healthy people -(-21.8±1.4%) and 0%, respectively. LVSR was significant less in IPAH patients, but in the normal range. We found significant correlations of CAVI with age, history of syncope, bilirubin, uric acid, total cholesterol, cardiac output, cardiac index, RVET, LVET and E/A. Multiple linear regression confirmed the independent significance for age (β=0.083±0.023, CI 0.033-0.133) and RVET (β=-0.018±0.005, CI -0.029 to -0.008) only. The risk to have CAVI ≥8 increased in 5.8 times in IPAH patients with RVET <248 ms (P=0.046). CAVI did not correlate with LVGLS and LVSR. Conclusion Significant worse systolic and diastolic LV functions were stated in pulmonary hypertensive patients compared to the control group. No LV GLS, no LV SR had significant associations with arterial stiffness evaluated by CAVI.
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Affiliation(s)
- Ganna Dmytrivna Radchenko
- State Institution “National Scientific Center “The M.D. Strazhesko Institute of Cardiology, Clinical and Regenerative Medicine of the National Academy of Medical Science of Ukraine”, Kyiv, Ukraine,Correspondence: Ganna Dmytrivna Radchenko, State Institution National Scientific Center “The M.D. Strazhesko Institute of Cardiology, Clinical and Regenerative Medicine of the National Academy of Medical Science of Ukraine”, 5, Svyatoslava Khorobroho str., Kyiv, 03151, Ukraine, Tel +38-0667128405, Email
| | - Yurii Anatoliiovych Botsiuk
- State Institution “National Scientific Center “The M.D. Strazhesko Institute of Cardiology, Clinical and Regenerative Medicine of the National Academy of Medical Science of Ukraine”, Kyiv, Ukraine
| | - Yuriy Mykolaiyovich Sirenko
- State Institution “National Scientific Center “The M.D. Strazhesko Institute of Cardiology, Clinical and Regenerative Medicine of the National Academy of Medical Science of Ukraine”, Kyiv, Ukraine
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Cardio-Vascular Interaction Evaluated by Speckle-Tracking Echocardiography and Cardio-Ankle Vascular Index in Hypertensive Patients. Int J Mol Sci 2022; 23:ijms232214469. [PMID: 36430943 PMCID: PMC9692763 DOI: 10.3390/ijms232214469] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/13/2022] [Accepted: 11/20/2022] [Indexed: 11/23/2022] Open
Abstract
Hypertension increases arterial stiffness, leading to dysfunction and structural changes in the left atrium (LA) and left ventricle (LV). However, the effects of hypertension on the right atrium (RA) and the right ventricle are still not fully understood. The purpose of this study was to clarify whether there is an interaction not only in the left ventricular system but also in the right ventricular system in hypertensive patients with preserved LV ejection fraction. The current retrospective observational study included patients (n = 858) with some risk of metabolic abnormalities (hypertension, diabetes, and dyslipidemia) who had visited our hospital and undergone echocardiography between 2015 and 2018. Among them, we retrospectively studied 165 consecutive hypertensive patients with preserved LV ejection fraction who had echocardiography performed on the same day as a cardio-ankle vascular index (CAVI) in our hospital. The phasic function of both atria was evaluated by two-dimensional speckle-tracking echocardiography. CAVI was measured using Vasela 1500 (Fukuda Denshi®). In the univariate analysis, CAVI was significantly correlated with LA and RA conduit function (LA conduit function, r = -0.448, p = 0.0001; RA conduit function, r = -0.231, p = 0.003). A multivariate regression analysis revealed that LA and RA conduit function was independently associated with CAVI (LA, t = -5.418, p = 0.0001; RA, t = -2.113, p = 0.036). CAVI showed a possibility that the association between heart and vessels are contained from not only LA phasic function but also RA phasic function in hypertensive patients.
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Effects of pulmonary hypertension on microcirculatory hemodynamics in rat skeletal muscle. Microvasc Res 2022; 141:104334. [PMID: 35104507 PMCID: PMC8928216 DOI: 10.1016/j.mvr.2022.104334] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/12/2022] [Accepted: 01/25/2022] [Indexed: 11/20/2022]
Abstract
Pulmonary hypertension (PH) has previously been characterized as a disease of the pulmonary vasculature that subsequently results in myocardial dysfunction. Heart failure compromises skeletal muscle microvascular function, which contributes to exercise intolerance. Therefore, we tested the hypothesis that such changes might be present in PH. Thus, we investigated skeletal muscle oxygen (O2) transport in the rat model of PH to determine if O2 delivery (Q̇O2) is impaired at the level of the microcirculation as evidenced via reduced red blood cell (RBC) flux, velocity, hematocrit, and percentage of capillaries flowing in quiescent muscle. Adult male Sprague-Dawley rats were randomized into healthy (n = 9) and PH groups (n = 9). Progressive PH was induced via a one-time intraperitoneal injection of monocrotaline (MCT; 50 mg/kg) and rats were monitored weekly via echocardiography. Intravital microscopy in the spinotrapezius muscle was performed when echocardiograms confirmed moderate PH (preceding right ventricular (RV) failure). At 25 ± 9 days post-MCT, PH rats displayed RV hypertrophy (RV/(Left ventricle + Septum): 0.28 ± 0.05 vs. 0.44 ± 0.11), pulmonary congestion, and increased right ventricular systolic pressure (21 ± 8 vs. 55 ± 14 mm Hg) compared to healthy rats (all P < 0.05). Reduced capillary RBC velocity (403 ± 140 vs. 227 ± 84 μm/s; P = 0.01), RBC flux (33 ± 12 vs. 23 ± 5 RBCs/s; P = 0.04) and % of capillaries supporting continuous RBC flux at rest (79 ± 8 vs. 56 ± 13%; P = 0.01) were evident in PH rats compared to healthy rats. When Q̇O2 within a given field of view was quantified (RBC flux x % of capillaries supporting continuous RBC flux), PH rats demonstrated lower overall Q̇O2 (↓ 50%; P = 0.002). These data support that microcirculatory hemodynamic impairments (↓ Q̇O2 and therefore altered Q̇O2-to-V̇O2 matching) may compromise blood-myocyte O2 transport in PH. The mechanistic bases for decreased capillary RBC flux, velocity, and percentage of capillaries supporting RBC flow remains an important topic.
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Goodman R, Chirinos JA, Ky B, Mazurek JA, Smith KA, Palevsky HI, Fritz JS, Pugliese SC, Kawut SM, Al-Naamani N. Systemic arterial properties in pulmonary hypertension. Pulm Circ 2021; 11:20458940211055684. [PMID: 34804490 PMCID: PMC8597072 DOI: 10.1177/20458940211055684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Randi Goodman
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA, USA
| | - Julio A Chirinos
- Division of Cardiovascular Medicine, Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Bonnie Ky
- Division of Cardiovascular Medicine, Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jeremy A Mazurek
- Division of Cardiovascular Medicine, Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Kerri Akaya Smith
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA, USA
| | - Harold I Palevsky
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA, USA
| | - Jason S Fritz
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA, USA
| | - Steven C Pugliese
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA, USA
| | - Steven M Kawut
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA, USA
| | - Nadine Al-Naamani
- Division of Pulmonary, Allergy and Critical Care, University of Pennsylvania, Philadelphia, PA, USA
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De Luca M, Iacono O, Valente V, Giardino F, Crisci G, Lettieri M, Marra A, Giallauria F, Oliviero U. Can pulse wave velocity (PWV) alone express arterial stiffness? A neglected tool for vascular function assessment. J Basic Clin Physiol Pharmacol 2021; 33:373-379. [PMID: 34284526 DOI: 10.1515/jbcpp-2021-0193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 07/05/2021] [Indexed: 12/20/2022]
Abstract
Arterial stiffness, defined as the rigidity of the arterial wall, is the consequence of vascular aging and is associated with the full spectrum of cardiovascular diseases. Carotid-femoral pulse wave velocity (cf-PWV) is the gold standard method for arterial stiffness evaluation: it measures the velocity of the arterial pulse along the thoracic and abdominal aorta alongside arterial distensibility. Its value rises as stiffness progresses. Cf-PWV is helpful to assess residual cardiovascular risk (CVR) in hypertension (HT). In fact, an increase in pulsatility and arterial stiffness predicts CVR in patients affected by arterial HT, independently of other risk factors. Arterial stiffness can predict cardiovascular events in several other clinical conditions such as heart failure, diabetes, and pulmonary HT. However, cf-PWV has not been yet included in routine clinical practice so far. A possible reason might be its methodological and theoretical limitations (inaccuracy in the traveled distance, intra and interindividual variability, lack of well-defined references values, and age- and blood pressure-independent cutoff). To exceed these limits a strict adherence to guidelines, use of analytical approaches, and possibility of integrating the results with other stiffness examinations are essential approaches.
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Affiliation(s)
- Mariarosaria De Luca
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Olimpia Iacono
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Valeria Valente
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Federica Giardino
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Giulia Crisci
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Maddalena Lettieri
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Alberto Marra
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
- Center for Pulmonary Hypertension, Thoraxklinik at Heidelberg University Hospital, Heidelberg, Germany
| | - Francesco Giallauria
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
| | - Ugo Oliviero
- Department of Translational Medical Sciences, "Federico II" University, Naples, Italy
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Peripheral Arterial Stiffness in Acute Pulmonary Embolism and Pulmonary Hypertension at Short-Term Follow-Up. J Clin Med 2021; 10:jcm10143008. [PMID: 34300176 PMCID: PMC8307119 DOI: 10.3390/jcm10143008] [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] [Received: 04/24/2021] [Revised: 06/24/2021] [Accepted: 06/30/2021] [Indexed: 11/29/2022] Open
Abstract
Chronic thromboembolic pulmonary hypertension (CTEPH) is a severe and under-recognized complication of acute pulmonary embolism (PE). Forty consecutive patients with acute PE (Group 1), predominantly female (22, 55%) with a mean age of 69 ± 15 years, were matched for demographic data with 40 healthy subjects (Group 2), 40 systemic hypertension patients (Group 3) and 45 prevalent idiopathic pulmonary arterial hypertension (IPAH) patients (Group 4). The baseline evaluation included physical examination, NYHA/WHO functional class, right heart catheterization (RHC) limited to IPAH patients, echocardiographic assessment and systemic arterial stiffness measurement by cardio-ankle vascular index (CAVI). Patients with PE underwent an echocardiographic evaluation within 1 month from hospital discharge (median 27 days; IQR 21–30) to assess the echo-derived probability of PH. The CAVI values were significantly higher in the PE and IPAH groups compared with the others (Group 1 vs. Group 2, p < 0.001; Group 1 vs. Group 3, p < 0.001; Group 1 vs. Group 4, p = ns; Group 4 vs. Group 2, p < 0.001; Group 4 vs. Group 3, p < 0.001; Group 2 vs. Group 3, p = ns). The predicted probability of echocardiography-derived high-risk criteria of PH increases for any unit increase of CAVI (OR 9.0; C.I.3.9–20.5; p = 0.0001). The PE patients with CAVI ≥ 9.0 at the time of hospital discharge presented an increased probability of PH. This study highlights a possible positive predictive role of CAVI as an early marker for the development of CTEPH.
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Sato S, Shimizu K, Ito T, Tsubono M, Ogawa A, Sasaki T, Takahashi M, Noro M, Shirai K. Increased Arterial Stiffness in Chronic Thromboembolic Pulmonary Hypertension Was Improved with Riociguat and Balloon Pulmonary Angioplasty: A Case Report. Int Med Case Rep J 2021; 14:191-197. [PMID: 33824604 PMCID: PMC8018559 DOI: 10.2147/imcrj.s303997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/06/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The role of arterial stiffness in the pathophysiology of chronic thromboembolic pulmonary hypertension (CTEPH) is unclear. The cardio-ankle vascular index (CAVI) is a novel arterial stiffness index reflecting stiffness of the arterial tree from the origin of the aorta to the ankle, independent from blood pressure at the time of measurement. CAVI reflects functional stiffness, due to smooth muscle cell contraction or relaxation, and organic stiffness, due to atherosclerosis. Here, we report the case of a patient with an increased CAVI due to CTEPH and the improvement after riociguat administration and balloon pulmonary angioplasty (BPA). CASE PRESENTATION A 65-year-old man suffered from dyspnea on exertion, and he was diagnosed with distal CTEPH. The mean pulmonary artery pressure (mPAP) was 51 mmHg, and the initial CAVI was 10.0, which is high for patient's age. In addition to right ventricular dysfunction, left ventricular dysfunction was observed as reduced global longitudinal strain (GLS-LV). After riociguat administration, CAVI decreased to 9.1 and GLS-LV improved from -10.3% to -17.3%, although pulmonary hypertension remained (mPAP 41 mmHg). Subsequently, a total of five BPA sessions were performed. Six months after the final BPA, mPAP decreased to 19 mmHg and GLS-LV improved to 19.3%. The patient was symptom free and his 6-minute walk distance improved from 322 m to 510 m. CAVI markedly decreased to 5.8, which is extremely low for his age. CONCLUSION These observations suggested that arterial stiffness as measured by CAVI was increased in CTEPH, potentially deteriorating cardiac function because of enhanced afterload. The mechanism of the increase of CAVI in this case of CTEPH was obscure; however, riociguat administration and BPA might improve the pathophysiology of CTEPH partly by decreasing CAVI.
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Affiliation(s)
- Shuji Sato
- Department of Cardiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Kazuhiro Shimizu
- Department of Cardiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Takuro Ito
- Department of Cardiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Masakazu Tsubono
- Department of Cardiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Akihiro Ogawa
- Department of Rehabilitation, Toho University Sakura Medical Center, Chiba, Japan
| | - Takeshi Sasaki
- Department of Clinical Functional Physiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Mao Takahashi
- Department of Cardiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Mahito Noro
- Department of Cardiology, Toho University Sakura Medical Center, Chiba, Japan
| | - Kohji Shirai
- Department of Internal Medicine, Mihama Hospital, Chiba, Japan
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Radchenko GD, Sirenko YM. Prognostic Significance of Systemic Arterial Stiffness Evaluated by Cardio-Ankle Vascular Index in Patients with Idiopathic Pulmonary Hypertension. Vasc Health Risk Manag 2021; 17:77-93. [PMID: 33731998 PMCID: PMC7957228 DOI: 10.2147/vhrm.s294767] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/27/2021] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND In a previous study, the cardio-ankle vascular index (CAVI) was increased significantly in idiopathic pulmonary arterial hypertension (IPAH) patients compared to the healthy group and did not much differ from one in systemic hypertensives. In this study the relations between survival and CAVI was evaluated in patients with IPAH. PATIENTS AND METHODS We included 89 patients with new-diagnosed IPAH without concomitant diseases. Standard examinations, including right heart catheterization (RHC) and systemic arterial stiffness evaluation, were performed. All patients were divided according to CAVI value: the group with CAVI ≥ 8 (n = 18) and the group with CAVI < 8 (n = 71). The mean follow-up was 33.8 ± 23.7 months. Kaplan-Meier and Cox regression analysis were performed for the evaluation of our cohort survival and the predictors of death. RESULTS The group with CAVI≥8 was older and more severe compared to the group with CAVI< 8. Patients with CAVI≥8 had significantly reduced end-diastolic (73.79±18.94 vs 87.35±16.69 mL, P<0.009) and end-systolic (25.71±9.56 vs 33.55±10.33 mL, P<0.01) volumes of the left ventricle, the higher right ventricle thickness (0.77±0.12 vs 0.62±0.20 mm, P < 0.006), and the lower TAPSE (13.38±2.15 vs 15.98±4.4 mm, P<0.018). RHC data did not differ significantly between groups, except the higher level of the right atrial pressure in patients with CAVI≥ 8-11.38±7.1 vs 8.76±4.7 mmHg, P<0.08. The estimated overall survival rate was 61.2%. The CAVI≥8 increased the risk of mortality 2.34 times (CI 1.04-5.28, P = 0.041). The estimated Kaplan-Meier survival in the patients with CAVI ≥ 8 was only 46.7 ± 7.18% compared to patients with CAVI < 8 - 65.6 ± 4.2%, P = 0.035. At multifactorial regression analysis, the CAVI reduced but saved its relevance as death predictor - OR = 1.13, CI 1.001-1.871. SUMMARY We suggested the CAVI could be a new independent predictor of death in the IPAH population and could be used to better risk stratify this patient population if CAVI is validated as a marker in a larger multicenter trial.
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Affiliation(s)
- Ganna D Radchenko
- Department of Symptomatic Hypertension, “National Scientific Center “The M.D. Strazhesko Institute of Cardiology”” of National Academy of Medical Science, Kyiv, Ukraine
| | - Yuriy M Sirenko
- Department of Symptomatic Hypertension, “National Scientific Center “The M.D. Strazhesko Institute of Cardiology”” of National Academy of Medical Science, Kyiv, Ukraine
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