Cardiac Exam - Auscultation Apex

You are incorrect - our patient's acoustic events at the time of the first heart sound at the apex include a first heart sound, a second heart sound and a third heart sound (S3).

Your choice: S1 + S2 + opening snap (OS)

This is a graphic example of an S1 an S2 and an opening snap (OS).

The opening snap is a high-frequency sound that is related to the opening of a stenotic, but mobile, mitral valve. The second heart sound-opening snap interval may be up to twelve hundredths of a second. The opening snap is associated with a loud first sound and a diastolic murmur of mitral stenosis.