in order to define quantitatively the histological characteristics of the hypertrophied myocardium of the right ventricular outflow tract in patients with congenital heart disease , a light-microscopic study of biopsy specimens obtained from 20 cases with tetralogy of fallot ( tof ) and 14 cases with muscular obstruction of the right ventricular outflow tract ( rvoto ) was performed using a semi-automatic sampling counter .
C0152021
congenital heart disease
C0039685
tetralogy of fallot