- Inter-ventricular connection
- Most common congenital defect in kids
- Can manifest in adulthood, if smaller w/pathophysiology developing over time, though this is unusual
- Typically L to R shunting
- Rare complication of MI (5-7d post, acute SOB and decompensation)
- Slowly progressive DOE
- Paradoxical emboli
- Systolic murmur along lower sternal border
- Sometimes murmur of AI
- Other findings CHF
- Findings of endocarditis if suggestive sx