This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acyanotic Congenital Heart Disease, Subject name: Pediatrics
Large PDA leads to - 
Select and explain. 
A. Endocardial valvulitis, B. Eisenmenger syndrome, C. CHF, D. All of above
D: All of above
Answer: D: All of above 
Explanation: Ans. is 'd' i.e., AH of above Patent ductus arteriosus (PDA)o Small PDA may not cause any complication but targe defect if untread may leads to :Pulmonary hypertension Left to Right shunt leads to too much circulation of blood in lung which leads to pulmonary hypertension.Eisenmenger's syndrome - Large standing pulmonary hypertension leads to permanent lung damage and causes Right to Left shunt.Endocarditis.Arrhythmia Enlargement of heart due to PDA increase risk of arrhythmias.