one hundred patients , institutionalized for mental retardation , aged between 3 and 14 years ( mean age 12.2 +/- 3 ) and free from cardiovascular and pulmonary diseases , were studied using doppler technique ( pulsed wave-continuous wave and color-coded doppler ) , to evaluate the prevalence of pulmonary regurgitation .
C0007226
cardiovascular
C0034088
pulmonary regurgitation