0251: Prognostic value of exercise-induced left ventricular systolic dysfunction in hypertensive Algerian patients without coronary artery disease

Abstract

We sought to assess the prognostic value of exercise-induced left ventricular systolic dysfunction in hypertensive Algerian patients with normal resting echocardiography and absence of coronary artery disease. From our database of patients (military hospitals of Algeria) referred for treadmill exercise echocardiography, we identified 91 hypertensive patients with preserved resting left ventricular ejection fraction (>50%), no evidence of structural heart disease, and absence of coronary artery disease on angiography. Overall, 38 patients developed exercise-induced left ventricular systolic dysfunction (defined as a decrease in left ventricular ejection fraction below 50% at peak exercise) and 53 exhibited a normal left ventricular ejection fraction response to exercise. The mean follow-up was 6.1 (3.7) years. End points were all-cause mortality, cardiac death, heart failure, and the composite event of cardiac death or heart failure. Patients who developed exercise-induced left ventricular systolic dysfunction were at higher risk of death from any cause (hazard ratio=3.4; 95% confidence interval, 1.1-10.3), cardiac death (hazard ratio=5.6; 95% CI, 1.1-29.4), heart failure (hazard ratio=8.9; 95% confidence interval, 1.8-44.2), and the composite end point (hazard ratio=5.7; 95% confidence interval, 1.7-19.0). In the multivariate analysis, exercise-induced left ventricular systolic dysfunction remained an independent predictor of both heart failure (hazard ratio=6.9; 95% CI, 1.3-37.4) and the composite event of cardiac death or heart failure (hazard ratio=4.5; 95% confidence interval, 1.2-16.0). In hypertensive Algerian patients patients with preserved resting left ventricular ejection fraction and absence of coronary artery disease, exercise-induced left ventricular systolic dysfunction is a strong predictor of cardiac events and may represent early hypertensive heart disease.