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The effects of spironolactone on atrial remodeling in patients with preserved left ventricular function after an

Mehmet Kayrak1, Ahmet Bacaksiz, Mehmet A Vatankulu

  • 1Department of Cardiology, Selcuk University Meram School of Medicine Hospital, Konya, Turkey.

Coronary Artery Disease
|October 8, 2010
PubMed

Insights

Spironolactone slightly improved left atrial function after acute myocardial infarction (AMI) in patients with preserved ejection fraction. It enhanced atrial emptying but did not significantly alter atrial dimensions or contraction velocity.

Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • Atrial remodeling is a key component of cardiac remodeling post-acute myocardial infarction (AMI).
  • Preserved left ventricular (LV) function is common in certain AMI patient populations.

Purpose of the Study:

  • To investigate the impact of spironolactone on atrial remodeling in AMI patients with preserved LV function.
  • To assess changes in atrial electromechanic properties using echocardiography and tissue Doppler imaging (TDI).

Main Methods:

  • 110 AMI patients with preserved ejection fraction (≥40%) were randomized to conventional therapy or conventional therapy plus spironolactone (25 mg/day).
  • Echocardiography and TDI were performed at baseline (48-72h post-AMI) and 6-month follow-up.
  • Key metrics included left atrial volume index, emptying fraction, and atrial contraction times (TE).

Main Results:

  • Spironolactone significantly increased left atrial emptying fraction compared to baseline and the control group.
  • No significant changes were observed in left atrial volume index or dimensions in either group.
  • While atrial contraction velocity remained unchanged, atrial electromechanical conduction times (LA-TE, interatrial septum-TE, right atrium-TE) were prolonged in the conventional therapy group.

Conclusions:

  • Spironolactone offers a modest benefit for left atrial remodeling and atrial electromechanic properties in AMI patients with preserved LV function.
  • These findings suggest a potential role for spironolactone in managing atrial changes post-AMI, even with preserved LV function.
Abstract

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