M-shaped doppler signal across ventricular septal defect: potential implications for estimation of right ventricuilar systolic pressure.
An 8-year-old child suffering from ventricular septal defect and severe valvular pulmonary stenosis was evaluated by echo-Doppler technique and cardiac catheterization. A peak instantaneous transventricular systolic gradient of 64 mmHg was recorded across the ventricular septal defect with an interesting M-shaped spectral pattern. However, cardiac catheterization revealed a peak-to-peak non-simultaneous gradient between the right and the left ventricle of only 14 mmHg. This discrepancy along with its implications are discussed in this report.
Mohan
J C
JC
Department of Interventional Cardiology, Metro Golden Heart Institute, New Delhi. jcmohan@vsnl.com
Nath
L R
LR
D006328:Cardiac Catheterization; D002648:Child; D003937:Diagnosis, Differential; D015150:Echocardiography, Doppler; D006345:Heart Septal Defects, Ventricular / Q000150:complications / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011666:Pulmonary Valve Stenosis / Q000150:complications / Q000000981:diagnostic imaging*