You pull out your cardiology stethoscope and listen intently to the heart sounds. At first you think you can hear a mid diastolic murmur, but then it disappears, as in fact do all the patient's heart sounds.

You tap your stethoscope - probably that troublesome earwax clogging the earpieces again. You ask the assistant for something to clean them out with, but she's too busy laying out a dead body to help. You leave in search of a paperclip - that normally does the trick.