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Determinants of atrial fibrillation development in patients with hypertrophic cardiomyopathy

Maria-Angela Losi1, Sandro Betocchi, Mariano Aversa

  • 1Department of Clinical Medicine, Cardiovascular and Immunological Sciences, Federico II University School of Medicine, Naples, Italy.

The American Journal of Cardiology
|October 7, 2004
PubMed

Insights

Left atrial function predicts atrial fibrillation (AF) in hypertrophic cardiomyopathy (HC) patients. Impaired LA function is a strong, independent risk factor for developing AF, even when accounting for age.

Area of Science:

  • Cardiology
  • Echocardiography
  • Electrophysiology

Background:

  • Atrial fibrillation (AF) exacerbates symptoms and heart failure in hypertrophic cardiomyopathy (HC) patients.
  • Predictors of AF development in HC are not well-established.

Purpose of the Study:

  • To investigate the role of left atrial (LA) function in predicting AF development in HC patients.
  • To identify specific LA parameters associated with AF risk.

Main Methods:

  • Prospective study of 150 HC patients without prior AF, followed for 5.2 years.
  • Echocardiography used to measure LA function (global LA fractional shortening), LA diameter, and LA volume.
  • Statistical analysis including logistic regression and Kaplan-Meier survival analysis.

Main Results:

  • Twenty patients developed AF during follow-up.
  • Impaired LA function was an independent predictor of AF (OR 0.716, p < 0.001).
  • LA diameter and volume also predicted AF, alongside age; LA dysfunction indicated high AF risk.

Conclusions:

  • Left atrial function is a significant and independent predictor of AF development in patients with HC.
  • Echocardiographic assessment of LA function can identify HC patients at high risk for AF.

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