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Uptodate Reference Title
Phonocardiogram of a child with valvar pulmonic stenosis
Phonocardiogram of a child with valvar pulmonic stenosis
Phonocardiogram recorded at left upper sternal border in a 4-year-old child with a 45 mmHg peak systolic gradient across the pulmonary valve. The early systolic EC that precedes the murmur is more prominent in expiration than in inspiration.
EC: ejection click; SM: systolic murmur; S2: second heart sound.