ISSN:
1432-1971
Keywords:
Ventricular septal defect
;
Pulmonary hypertension
;
Doppler echocardiography
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Pulsed Doppler echocardiographic and hemodynamic examinations were performed in 31 patients (mean age 17.8 years) with isolated ventricular septal defect (VSD). Three groups were studied: group I (n=6) patients had severe pulmonary vascular obstructive disease (PVOD); group II (n=12) patients had pulmonary hypertension (PH) without severe PVOD; group III (n=13) patients had no PH. Bidirectional shunting was detected in 9 VSD patients (6 in group I and 3 in group II). Patients with low to moderately elevated right ventricular pressures demonstrated left-to-right shunting across the defect throughout the cardiac cycle. When systolic pressure in the right ventricle reached approximately 60% of the left ventricular pressure, right-to-left shunting occurred across the defect during early and mid diastole. However, in patients with Eisenmenger syndrome (group I) the right-to-left shunting occurred during late systole with continuation during the early and mid diastolic period. The earlier occurrence of right-to-left shunting (index 〈0.5 second) signifies the presence of severe PVOD.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02310326
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