Short systolic murmur in a child with a small muscular ventricular septal defect

Phonocardiogram recorded at the left lower sternal border in a 6-year-old child with a small apical muscular ventricular septal defect. The SM is short and does not extend to S₂.

S₁: first heart sound; S₂: second heart sound; SM: systolic murmur.

Graphic 104799 Version 2.0

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