16 August 2026
: Case report 
Severe Tricuspid Regurgitation: Traumatic Papillary Muscle Rupture Mimicking Infective Endocarditis—A Case Report
Challenging differential diagnosis, Management of emergency care, Rare disease
Soichiro Kobayashi E 1,2, Taku Omori
E 1*, Daisuke Izumi E 2,3, Toshiya Tokui E 4, Atsunobu Kasai E 2, Kaoru Dohi E 1
DOI: 10.12659/AJCR.952267
Am J Case Rep 2026; 27:e952267
Figure 3 Intraoperative Image.The white arrow indicates the ruptured tip of the papillary muscle connected to the chordae tendineae of the anterior tricuspid leaflet, resulting in prolapse of the leaflet. Abbreviations: ATL, anterior tricuspid leaflet; RA, right atrium; RV, right ventricle.