DETECTION AND QUANTITATION OF ISCHEMIC LEFT-VENTRICULAR DYSFUNCTION USING A NEW VIDEO INTENSITY TECHNIQUE FOR REGIONAL WALL MOTION EVALUATION

Eighty patients with ischemic heart disease and 17 normal subjects were evaluated for left ventricular regional wall motion by means of a new method. The wall motion analysis is based on video intensity. This technique uses a temporally sliding analysis to evaluate the cardiac cycle in 100 msec intervals. Presence of coronary artery disease was defined as more than 50% measured diameter stenosis. Wall motion abnormalities in regions perfused by stenotic vessels were most common in early diastole (76%). Sensitivity of this method at rest in patients with coronary artery disease was 79.7% (p < 0.0001) and overall accuracy was 84.2% (p < 0.0001). Abnormalities in both systole and diastole were more common in regions perfused by severe lesions (>75%) than in those perfused by moderately stenotic (<75%) vessels (p < 0.05). A comparison of the new method with phase and amplitude analysis was performed in 15 patients and with two-frame analysis in 40 patients. This new method yielded a higher sensitivity than either of the other two methods. © 1990.