What is the significance of a monophasic pericardial friction rub in the evaluation of acute pericarditis?

Updated: Apr 02, 2019
  • Author: Sean Spangler, MD; Chief Editor: Terrence X O'Brien, MD, MS, FACC  more...
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Especially when the pericardial friction rub is monophasic, it can be mistaken for a systolic murmur. Pericardial rubs may be differentiated if the rub does not change with usual respiratory or positional maneuvers, if 3 components are present, and if the findings on the electrocardiograms are typical. That is, a friction rub has a changing character from heartbeat to heartbeat and with patient position changes. In addition, a friction rub is closer to the ear on auscultation than a murmur.

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