الفهرس 
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Abstract
Atrioventricular septal defect (AVSD) is abnormal development of
the atrioventricular valves and the septum between the atrial and
ventricular chambers. Pulmonary hypertension (PH) complicates the
course of AVSD. Aim of the study to detect the riskfactors of PH.
Clinical examination and investigations were done for 50 patients with
AVSD . we found that risk factors of PH are size of VSD,AVSD and AV
valve regurgitation while the risk factor of pulmonary vascular disease
(PVD) is size of VSD