A 58-year-old man with acute inferior wall infarction developed a loud systolic murmur hypotension, and pulmonary edema four days after onset of infarction. M-mode echocardiography demonstrated an unusual diastolic echo that appeared between the mitral valve leaflets. Complete rupture of the posterior papillary muscle was confirmed at surgery for mitral valve replacement.
DasGupta, Dipankar S. and D'Cruz, I. A.
"Postinfarction Papillary Muscle Rupture: A New M-Mode Echocardiographic Sign,"
Henry Ford Hospital Medical Journal
: Vol. 34
Available at: https://scholarlycommons.henryford.com/hfhmedjournal/vol34/iss1/15