Related Experiment Video

Updated: Aug 22, 2026

Contractility Measurements on Isolated Papillary Muscles for the Investigation of Cardiac Inotropy in Mice
06:22

Contractility Measurements on Isolated Papillary Muscles for the Investigation of Cardiac Inotropy in Mice

Published on: September 17, 2015

[Papillary muscle rupture]

Tsuneo Ariyoshi1, Kiyoyuki Eishi

  • 1Department of Cardiovascular Surgery, Nagasaki University School of Medicine, Nagasaki, Japan.

Kyobu Geka. the Japanese Journal of Thoracic Surgery
|September 15, 2004
PubMed

Insights

Papillary muscle rupture (PMR) is a rare complication of acute myocardial infarction (AMI). Early diagnosis via echocardiography and prompt surgical intervention, including mitral valve surgery and coronary artery bypass grafting, are crucial for survival.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Medical Diagnostics

Context:

  • Papillary muscle rupture (PMR) is a rare but life-threatening mechanical complication following acute myocardial infarction (AMI).
  • Patients often present with acute pulmonary edema and cardiogenic shock.
  • A new heart murmur may not always be present, complicating early diagnosis.

Purpose:

  • To highlight the critical nature of PMR post-AMI.
  • To emphasize accurate diagnostic modalities for PMR.
  • To outline optimal surgical management strategies for PMR.

Summary:

  • Transesophageal echocardiography is essential for accurate PMR diagnosis, complemented by coronary angiography for surgical planning.
  • Combined myocardial revascularization and mitral valve surgery (repair or replacement) should be performed urgently.
  • Mitral valve repair is feasible only in select cases; valve replacement is preferred when technically challenging.

Impact:

  • Timely diagnosis and intervention significantly impact patient survival rates.
  • Combined surgical approach improves left ventricular function and long-term outcomes.
  • Coronary artery bypass grafting, particularly in multivessel disease, is theoretically beneficial and recommended for improved survival.

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