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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
28:13

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

Published on: February 26, 2013

Previously known and newly diagnosed atrial fibrillation: a major risk indicator after a myocardial infarction

Lars Køber1, Karl Swedberg, John J V McMurray

  • 1Department of Cardiology, Non-Invasive Lab, Rigshospitalet, 9 Blegdamsvej, Copenhagen, Denmark. LK@HEART.DK

European Journal of Heart Failure
|March 2, 2006
PubMed

Insights

Atrial fibrillation (AF) significantly increases mortality and major cardiovascular events in patients with acute myocardial infarction (MI) complicated by heart failure (HF) or left ventricular systolic dysfunction (LVSD). This risk applies to both current and prior AF diagnoses.

Area of Science:

  • Cardiology
  • Clinical Research
  • Epidemiology

Background:

  • Atrial fibrillation (AF) is a common arrhythmia.
  • Acute myocardial infarction (MI) with heart failure (HF) or left ventricular systolic dysfunction (LVSD) represents a high-risk patient population.
  • The impact of AF on outcomes in this specific complex patient group requires further characterization.

Purpose of the Study:

  • To investigate the relationship between atrial fibrillation (AF) and outcomes in patients with acute myocardial infarction (MI).
  • To assess the risk of death and major cardiovascular (CV) events in patients with MI complicated by heart failure (HF) and/or left ventricular systolic dysfunction (LVSD) in the presence of AF.
  • To differentiate outcomes based on current versus prior AF diagnoses.

Main Methods:

  • Analysis of data from the VALIANT trial, which enrolled 14,703 patients with acute MI, HF, and/or LVSD.
  • Assessment of AF status at presentation and randomization (median 4.9 days post-MI).
  • Evaluation of primary outcomes including all-cause mortality and major CV events at 3 years post-MI.

Main Results:

  • The study included 1812 patients with current AF, 339 with prior AF, and 12,509 without AF.
  • Patients with AF were older and had more comorbidities.
  • Three-year mortality was significantly higher in patients with current AF (38%) and prior AF (37%) compared to those without AF (20%).
  • Multivariable analysis showed increased hazard ratios for death (1.32 for current AF, 1.25 for prior AF) and major CV events (1.21 for current AF) in patients with AF.

Conclusions:

  • Atrial fibrillation (AF) is a significant independent predictor of adverse outcomes in patients with acute myocardial infarction (MI) complicated by heart failure (HF) or left ventricular systolic dysfunction (LVSD).
  • Both current and prior AF are associated with increased long-term mortality and major cardiovascular events.
  • These findings underscore the importance of managing AF in high-risk MI patients.
Abstract

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