pulmonic valve heart sound (P2)
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Introduction
Pulmonic component of 2nd heart sound (S2), or P2, reflecting closure of the pulmonic valve which normally follows A2 (closure of aortic valve).
Loud P2: pulmonary arterial hypertension, pulmonary embolism
Soft P2: pulmonic stenosis, heavily calcified valve
Diagnostic procedures
- pulmonary function testing
- low DLCO consistent with pulmonary hypertension[3]
Radiology
- echocardiography for pulmonary artery hypertension*
- ventilation perfusion scan for pulmonary embolism after confirmation of pulmonary artery hypertension[3]
* right heart catheterization for confirmation