A site for medical students - Practical,Theory,Osce Notes

What is pericardial knock

  • Pericardial knock is a loud high frequency diastolic sound produced by the abrupt halt in early diastolic filling due to the nondistensible pericardial shell overlying the heart
  • Seen in constrictive pericarditis
  • Diastolic high pitched sound
  • 0.08-0.10 sec after S2
  • Mistaken for Opening snap.