The effect of increased vascular afterload measures on flow rate and survival in severe aortic stenosis.

IF 6.7 1区 医学 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS European Heart Journal - Cardiovascular Imaging Pub Date : 2025-01-23 DOI:10.1093/ehjci/jeae331
Sara L Hungerford, Ning Song, Brandon Loo, Hari Sritharan, Eleanor Rye, Kay Everett, Andrew Jabbour, Christopher Hayward, Navin K Kapur, David W M Muller, Audrey I Adji
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引用次数: 0

Abstract

Aims: Although an association between the systemic circulation and transaortic flow rate (TFR) is frequently hypothesized in patients with aortic stenosis (AS), it has not been demonstrated previously. We sought to explore the relationship between blood pressure (BP), vascular afterload measures, clinical history of hypertension, TFR, and survival in patients with severe AS (aortic valve area ≤ 1 cm²).

Methods and results: We studied 323 patients ≥ 65 years (110 prospective, 213 registry analysis) who underwent transcatheter aortic valve replacement over a 5-year period. Aortic flow was obtained by Doppler echocardiography, with TFR calculated using a mathematical derivation method. A BP ≥ 140/90 mmHg and/or mean arterial pressure ≥ 90 mmHg was considered hypertensive. Simultaneous pressure-flow analysis demonstrated that higher systolic BP (ß -0.545; P = 0.01†), pulse pressure (ß -0.545; P = 0.01†), vascular resistance (ß -0.02; P = 0.041), characteristic impedance (ß -0.27; P = 0.01), and lower arterial compliance (ß 32.73; P < 0.001†) were associated with reduced TFR in linear regression. In registry analysis, TFR was lower in those with a history of hypertension (223 ± 67 vs. 244 ± 77 mL/s; r -0.138; P = 0.045), coronary artery disease (CAD, P < 0.01), dialysis dependency (P < 0.01), and with increased anti-hypertensive medication use (P = 0.04), of which CAD (ß -28.5; P = 0.08†) and dialysis dependency (ß -68.5; P = 0.04†) remained significant in linear regression. A TFR ≤ 210 mL/s in normotensive patients was the strongest predictor of mortality (73.3% vs. 86.7%; P = 0.043; † denotes adjusted).

Conclusion: Elevated vascular afterload measures and comorbidities linked to arteriosclerosis and/or degenerative aortic stiffening independently reduce flow rates in severe AS. A TFR ≤ 210 mL/s predicts mortality but improves with BP assessment during evaluation.

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来源期刊
European Heart Journal - Cardiovascular Imaging
European Heart Journal - Cardiovascular Imaging CARDIAC & CARDIOVASCULAR SYSTEMS-
CiteScore
11.60
自引率
9.70%
发文量
708
审稿时长
4-8 weeks
期刊介绍: European Heart Journal – Cardiovascular Imaging is a monthly international peer reviewed journal dealing with Cardiovascular Imaging. It is an official publication of the European Association of Cardiovascular Imaging, a branch of the European Society of Cardiology. The journal aims to publish the highest quality material, both scientific and clinical from all areas of cardiovascular imaging including echocardiography, magnetic resonance, computed tomography, nuclear and invasive imaging. A range of article types will be considered, including original research, reviews, editorials, image focus, letters and recommendation papers from relevant groups of the European Society of Cardiology. In addition it provides a forum for the exchange of information on all aspects of cardiovascular imaging.
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