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Beta-Blocker Use Is Associated With Impaired Left Atrial Function in Hypertension
Journal article   Peer reviewed

Beta-Blocker Use Is Associated With Impaired Left Atrial Function in Hypertension

Mayank Sardana, Amer Ahmed Syed, Zeba Hashmath, Timothy S Phan, Maheswara R Koppula, Uzma Kewan, Zoubair Ahmed, Ravikantha Chandamuri, Swapna Varakantam, Ejaz Shah, …
Journal of the American Heart Association, Vol.6(2), p.n/a
02/03/2017
DOI: 10.1161/JAHA.116.005163
PMID: 28159822
url
https://doi.org/10.1161/JAHA.116.005163View
Published (Version of record) Open Access

Abstract

Impaired left atrial (LA) mechanical function is present in hypertension and likely contributes to various complications, including atrial arrhythmias, stroke, and heart failure. Various antihypertensive drug classes exert differential effects on central hemodynamics and left ventricular function. However, little is known about their effects on LA function. We studied 212 subjects with hypertension and without heart failure or atrial fibrillation. LA strain was measured from cine steady-state free-precession cardiac MRI images using feature-tracking algorithms. In multivariable models adjusted for age, sex, race, body mass index, blood pressure, diabetes mellitus, LA volume, left ventricular mass, and left ventricular ejection fraction, beta-blocker use was associated with a lower total longitudinal strain (standardized β=-0.21; P=0.008), and lower LA expansion index (standardized β=-0.30; P<0.001), indicating impaired LA reservoir function. Beta-blocker use was also associated with a lower positive strain (standardized β=-0.19; P=0.012) and early diastolic strain rate (standardized β=0.15; P=0.039), indicating impaired LA conduit function. Finally, beta-blocker use was associated with a lower (less negative) late-diastolic strain (standardized β=0.15; P=0.049), strain rate (standardized β=0.18; P=0.019), and a lower active LA emptying fraction (standardized β=-0.27; P<0.001), indicating impaired booster pump function. Use of other antihypertensive agents was not associated with LA function. Beta-blocker use is significantly associated with impaired LA function in hypertension. This association could underlie the increased risk of atrial fibrillation and stroke seen with the use of beta-blockers (as opposed to other antihypertensive agents) demonstrated in recent trials.
 Adrenergic beta-Antagonists - therapeutic use Antihypertensive Agents - therapeutic use Atrial Function, Left - drug effects Atrial Function, Left - physiology Blood Pressure Determination - methods Female Heart Atria - diagnostic imaging Heart Atria - drug effects Heart Atria - physiopathology Humans Hypertension - diagnosis Hypertension - drug therapy Hypertension - physiopathology Magnetic Resonance Imaging, Cine - methods Male Middle Aged Stroke Volume - drug effects

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