Exercise testing (ET) has been used for assessing the arrhythmogenic tendency of myocardium in patients (pts) with coronary heart disease. It has been suggested that coronary patients with left ventricular (LV) dyssynergy are prone to present ventricular extrasystolic arrhythmia (VA) during ET. We studied the functional status of the LV in a group of 25 coronary patients who presented VA during ET (Group A), and compared the results with a group of 87 patients without VA during ET (Group B). No statistically significant difference was found between the two groups in end-diastolic pressure, ejection fraction, and extent of dyssynergy of the LV. Furthermore, no significant difference was noted in the extent of development of the collateral circulation.
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