Pulmonic Stenosis with Opening Snap

Amara Estrada, DVM, DACVIM (Cardiology) University of Florida

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This heart sound includes a grade 3-4 harsh, high-frequency, crescendo-decrescendo (ejection) murmur heard throughout systole (auscultated at the left heart base over the pulmonic valve) with a somewhat harsher S2-associated “snap” compared with other severe PS examples.

In this example (ie, of a dog with severe PS), the stenotic valve snaps open and domes forward during ejection, creating the opening snap.

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