What are the different phases of pericardial friction rub in acute pericarditis?

Updated: Apr 02, 2019
  • Author: Sean Spangler, MD; Chief Editor: Terrence X O'Brien, MD, MS, FACC  more...
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More than 50% of pericardial friction rubs are triphasic: (1) An atrial systolic rub that precedes S1, (2) a ventricular systolic rub occurs between S1 and S2 and is coincident with the peak carotid pulse, and (3) an early diastolic rub occurs after S2 (usually the faintest).

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