Application of doppler ultrasound in diagnosis of aortic and pulmonary valve stenosis

: 120 children (58 boys, 62 girls) aged 2 days-12 years (mean 3.5 +/- 3 years) with pulmonary or aortic valve stenosis underwent the study. Diagnosis was proved by a cardiac catheterization and angiography. There were determinated maximal flow velocities and pressure gradients through stenosed valve using the doppler ultrasound method. Values were compared with those obtained from cardiac catheterization. There were no statistically significant differences between these two methods. Increased blood flow velocities through the aortic or pulmonary valves were stated in the examined group comparing with healthy individuals. Obtained results prove Doppler method usefulness in diagnosis of aortic and pulmonary valve stenosis. In pulmonary valvular and subvalvular stenosis the Doppler method is useful for estimation of outflow tract obstruction while in a extreme case a results can be incompetent.