True about ASD :
Correct Answer: Left parasternal heeve is due to increased pulmonary aery flow
Description: Answer is B (Left parasternal heeve is due to increased pulmonary aery flow) In ASD large volume of blood reaches the left atrium, right atrium, right ventricle and Pulmonary circulation. Consequently there is enlargement of LA, RV as well as of the pulmonary aery and its branches, and this may contribute to the left parasternal haeve. ASD is a defect in atrial septum and not in patent foramen vale.S, is wide and fixed (not variable). P2 is accentuated. Q Systolic murmur in ASD is not caused by rapid flow of blood across the shunt. There is only a minor difference of pressure between the left and the right atrium. The shunt murmurs is therefore absent.Q Murmurs present are flow murmurs and not shunt murmurs : Delayed diastolic murmurs : due to increased flow across the tricuspid valve Ejection systolic : due to increased flow across the pulmonary valve
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