Murmur of VSD | AIIMS MCQs for PG Entrance

Which is true about murmur of VSD?

A. A systolic crescendo-decrescendo murmur heard best at the upper right sternal border with radiation to the carotids; the murmur is augmented with transient exercise
B. A systolic murmur at the pulmonic area and a diastolic rumble along the left sternal border
C. A holosystolic murmur at the mid-left sternal border
D. A diastolic decrescendo murmur at the mid-left sternal border

Ans. C. A holosystolic murmur at the mid-left sternal border

A holosystolic murmur at the mid-left sternal border is the murmur most characteristic of a ventricular septal defect. Both the murmur of ventricular septal defect and the murmur of mitral regurgitation are enhanced by exercise and diminished by amyl nitrite. Options a, b, d, and e describe the usual findings in aortic stenosis, atrial septal defect, aortic insufficiency, and patent ductus arteriosus, respectively.