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[Left ventricular diastolic properties before and after percutaneous transluminal coronary angioplasty evaluated by
1Third Department of Internal Medicine, Toho University School of Medicine, Tokyo.
Insights
Percutaneous transluminal coronary angioplasty (PTCA) improved left ventricular diastolic function by increasing rapid filling wave velocity. This suggests enhanced myocardial relaxation following the procedure.
Area of Science:
- Cardiology
- Echocardiography
- Physiology
Context:
- Assessing left ventricular diastolic properties is crucial for understanding cardiac function.
- Percutaneous transluminal coronary angioplasty (PTCA) is a common intervention for coronary artery disease.
Purpose:
- To evaluate the impact of PTCA on left ventricular diastolic properties using pulsed Doppler echocardiography.
- To determine if PTCA influences myocardial relaxation and diastolic function.
Summary:
- Pulsed Doppler echocardiography assessed diastolic function in 30 patients before and after PTCA.
- Key parameters measured included peak rapid filling velocity (R), peak atrial contraction velocity (A), and their ratio (A/R).
- Results showed a significant increase in R and a significant decrease in A/R post-PTCA, indicating improved diastolic function and myocardial relaxation.
Impact:
- The findings suggest that PTCA can beneficially affect left ventricular diastolic function.
- Echocardiographic assessment of diastolic properties provides valuable insights into cardiac function post-PTCA.
- This non-invasive method aids in evaluating the effectiveness of PTCA on ventricular performance.
Abstract:
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.