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pulmonic valve heart sound (P2)
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
Special laboratory:
- 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
General
second heart sound (S2)
References
- Harrison's Principles of Internal Medicine, 13th ed.
Companion Handbook, Isselbacher et al (eds), McGraw-Hill
Inc. NY, 1995, pg 327
- Mayo Internal Medicine Board Review, 1998-99, Prakash UBS (ed)
Lippincott-Raven, Philadelphia, 1998, pg 38
- NEJM Knowledge+