splitting of S2
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Introduction
- splitting of S2 represents asynchronous closure of aortic valve & pulmonic valve
- physiologic splitting of S2
- single S2 during expiration, a double S2 during inspiration
- fixed splitting of S2 is nearly pathognomonic for atrial septal defect
- parodoxical splitting of S2
- single S2 during inspiration, a double S2 during expiration
- associated with aortic stenosis, left bundle branch block, right ventricular pacing
More general terms
References
- ↑ Medical Knowledge Self Assessment Program (MKSAP) 20 American College of Physicians, Philadelphia 2025