[Evaluation of left ventricular systolic function reserve before and after percutaneous transluminal coronary angioplasty by isometric exercise Doppler and two-dimensional echocardiography].
Left ventricular systolic function reserve (LVSFR) was assessed by isometric exercise Doppler and two-dimensional echocardiography before and after percutaneous transluminal coronary angioplasty (PTCA) in 28 patients with coronary artery disease. Pulsed Doppler echocardiograms were obtained from the sample volume which was placed just below the aortic valve in the apical long-axis view. Three parameters, including peak velocity (PV), acceleration time (AT), and mean acceleration (ACC), were measured before and at the end of 2 min-handgrip exercise. The area reduction rate (AR) was calculated from the two-dimensional echocardiograms at the level of the papillary muscle in the short-axis view obtained at rest and at the end of exercise. Percent changes of these 4 parameters (%PV, %AT, %ACC, %AR) from at rest to the end of exercise were also calculated before and after PTCA. No significant changes were detected in PV, AT, ACC and AR at rest, before and after PTCA. Percent changes of PV, ACC, and AR increased significantly (p < 0.01), while those of AT decreased significantly after PTCA (p < 0.01). Our method proved to be useful for assessing LVSFR in coronary artery disease and the findings obtained using this method suggested that LVSFR can be alleviated by successful PTCA.
Imamura
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Y
Third Department of Internal Medicine, Toho University, Ohashi Hospital, Tokyo.
D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000628:therapy*; D015150:Echocardiography, Doppler; D015444:Exercise; D006801:Humans; D008297:Male; D008875:Middle Aged; D013599:Systole; D016277:Ventricular Function, Left