Functional and prognostic significance of exercise-induced ventricular arrhythmias in patients with suspected coronary artery disease

Abdou Elhendy, Krishnaswamy Chandrasekaran, Bernard J. Gersh, Douglas Mahoney, Kelli N. Burger, Patricia Pellikka

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Abstract

Our aims were to assess (1) the relation between exercise-induced ventricular arrhythmia (VA) and myocardial wall motion abnormalities during exercise echocardiography in patients with suspected coronary artery disease (CAD), and (2) the effect of this relation on outcome. We studied the clinical and prognostic significance of exercise-induced VA in 1,460 patients (mean age 64 ± 10 years; 867 men) with intermediate pretest probability of CAD and no history of previous myocardial infarction or revascularization who underwent exercise echocardiography. Exercise-induced VA occurred in 146 patients (10%). Compared with patients without VA, those with VA had a greater prevalence of abnormal exercise echocardiographic findings (48% vs 29%, p = 0.001) and ischemia on exercise echocardiography (39% vs 22%, p = 0.001), greater increase in wall motion score index with exercise (0.14 ± 0.28 vs 0.06 ± 0.18, p <0.0001), and a greater percentage of abnormal segments with exercise (21 ± 30% vs 9 ± 19%, p <0.0001). During follow-up (median 2.7 years), cardiac death and nonfatal myocardial infarction occurred in 36 patients. In multivariate analysis of combined clinical and exercise stress test variables, independent predictors of cardiac events were exercise-induced VA (chi-square 4.7, p = 0.03) and exercise heart rate (chi-square 18, p = 0.0001). The percentage of abnormal myocardial segments with exercise echocardiography was the most powerful predictor of VA (chi-square 31, p = 0.0001) and cardiac events (chi-square 15, p = 0.0001). In patients with suspected CAD, exercise-induced VA is associated with a greater risk of cardiac death and nonfatal myocardial infarction. This risk is attributed to the relation between VA and the extent and severity of left ventricular functional abnormalities with exercise.

Original languageEnglish (US)
Pages (from-to)95-100
Number of pages6
JournalAmerican Journal of Cardiology
Volume90
Issue number2
DOIs
StatePublished - Jul 15 2002

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Cardiac Arrhythmias
Coronary Artery Disease
Exercise
Echocardiography
Myocardial Infarction
Exercise Test
Myocardial Revascularization
Multivariate Analysis
Ischemia
Heart Rate

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Functional and prognostic significance of exercise-induced ventricular arrhythmias in patients with suspected coronary artery disease. / Elhendy, Abdou; Chandrasekaran, Krishnaswamy; Gersh, Bernard J.; Mahoney, Douglas; Burger, Kelli N.; Pellikka, Patricia.

In: American Journal of Cardiology, Vol. 90, No. 2, 15.07.2002, p. 95-100.

Research output: Contribution to journalArticle

Elhendy, Abdou ; Chandrasekaran, Krishnaswamy ; Gersh, Bernard J. ; Mahoney, Douglas ; Burger, Kelli N. ; Pellikka, Patricia. / Functional and prognostic significance of exercise-induced ventricular arrhythmias in patients with suspected coronary artery disease. In: American Journal of Cardiology. 2002 ; Vol. 90, No. 2. pp. 95-100.
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