[Left ventricular diastolic properties before and after percutaneous transluminal coronary angioplasty evaluated by pulsed Doppler echocardiography].
Left ventricular diastolic properties were assessed by pulsed Doppler echocardiography before and after percutaneous transluminal coronary angioplasty (PTCA) in 30 patients. Four parameters were measured from records obtained by directing the ultrasonic beam from the cardiac apex to the base and by locating the sample volume at the mitral orifice: 1) the peak velocity of the rapid filling wave (R), 2) the peak velocity of the atrial contraction wave (A), 3) the acceleration half time (Ta: the time from half of the peak velocity to the peak velocity of the R, and 4) deceleration half time (Td: the time from the peak velocity to half of the peak velocity of the R). The ratio of the peak velocity of the atrial contraction to that of the rapid filling wave (A/R) was also calculated. 1. The R increased significantly after PTCA (p less than 0.01), whereas no significant change was observed in the A. 2. The A/R decreased significantly after PTCA (p less than 0.01). 3. PTCA did not influence significantly the acceleration half time or the deceleration half time. The augmented rapid filling observed after PTCA may reflect improvement of left ventricular myocardial relaxation. Our method sensitive in assessing diastolic properties is helpful for evaluating left ventricular function after PTCA.
Suzuki
M
M
Third Department of Internal Medicine, Toho University School of Medicine, Tokyo.
Kashida
M
M
D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000503:physiopathology; D000800:Angioplasty, Balloon; D003971:Diastole; D015150:Echocardiography, Doppler; D005260:Female; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D009203:Myocardial Infarction / Q000503:physiopathology; D013318:Stroke Volume