LLSB: Pericardial Friction Rub
A pericardial friction rub consists of 3 sounds: one systolic, and two diastolic. The systolic sound may occur anywhere in systole and the two diastolic sounds occur at the times when the ventricles are stretched. This stretching occurs in early diastole and at the end of diastole. The pericardial friction rub has a scratching, grating, or squeaking leathery quality. It tends to be high in frequency and best heard with the diaphragm. A pericardial friction rub is a sign of pericardial inflammation, and may be heard in infective peri, carditis, in myocardial infarction, following cardiac surgery, trauma, and in autoimnune problems, such as rheumatic fever. They are frequently best heard at the LLSB with the patient leanng forward or lying supine in deep expiration.
The sound you heard is a typical pericardial friction rub recorded at the LLSB of a male with pericarditis.