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KMID : 0378019830260110091
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New Medical Journal
1983 Volume.26 No. 11 p.91 ~ p.96
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Echocardiographic Assessment of Right Ventricular Systolic Time Interval and Pulmonary Artery Pressure in Ventricular Septal Defect
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양성룡/Yang, Sung Yong
유대형/성인경/이준성/이경수/Yoo, Dae Hyung/Sung, In Kyung/Lee, Joon Sung/Lee, Kyong Su
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Abstract
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The ability to measure right ventricular systolic time intervals (RVSTI) echocardiographically should permit the non-invasive assessment of hemodynamic changes on right ventricular function and allow the evaluation of the pulmonary artery hypertension.
Pulmonary artery hypertension is serious and harmful to the patients with ventricular septal defect (VSD) for their corrective surgery, so early detection of it by serial non-invasive echocardiography is advantageous instead of repeated cardiac catheterization.
RVSTI is composed of right ventricular pre-ejection period (RPEP) and right ventricular ejection time (RVET).
RPEP/RVET ratio has excellent correlation with pulmonary artery diastilic pressure (PADP), which reflects resistance of pulmonary vascular bed.
Authors measured RVSTI and RPEP/RVET echocardiographically and checked pulmonary artery pressure by cardiac catheterization in 18 patients with VSD to determine the correlation between RVSTI and pulmonary artery pressure.
The results were as follows:
1. RPEPc were lengthened (r=0. 61) and RVETc were shortened (r=-0.782) by increasing PAD P.
2. RPEP/RVET had excellent correlation with PADP and MPAP (r=0.843, r=0.833).
3. RPEP/RVET were significantly higher in pulmonary hypertension than in normal pulmonary artery pressure. All with RPEP/RVET larger than 0. 30 had PADP higher than 20 mmHg.
Above results suggest that the use of the RPEP/RVET ratio permitted serial non-invasive evaluation of the pulmonary artery pressure in ventricular septal defect.
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