Auscultatory findings VSD will produce a systolic murmur. The classic murmur is grade ¾, holosystolic, harsh and blowing in character.It will peak in midsystole.  It is best heard along the lower left sternal border and apex. Smaller defects of small and medium defects will typically produce a louder sound than a larger defect as the blood velocity is higher. A VSD about to close will again diminish in amplitude and become faint and audible only in early systole.