When these sounds are distinguishable from each other a split S2 can be heard. The patterns of splitting of the S2 heart sound include physiologic splitting, paradoxical splitting, widened ...
Therefore, the A2 sound is the main component of S2. CLINICAL PEARL: A split S2 is best heard at the pulmonic valve listening post, as P2 is much softer than A2. Like the S1 heart sound ...
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