A survival case of acute mitral regurgitation and cardiogenic shock caused by subtotal occlusion of the first diagonal branch.
An 80-year-old woman was admitted with cardiogenic shock; she arrived in a deep coma with systolic blood pressure of 44 mmHg. An electrocardiogram showed ST elevation in I, aVL, V5 and V6, suggesting myocardial infarction in the lateral area of the left ventricle. A chest roentgenogram showed right pulmonary edema without cardiomegaly. Transthoracic and transesophageal echocardiograms revealed severe mitral regurgitation and a flailing anterior mitral valve leaflet, suggesting a ruptured papillary muscle. The patient was initially treated with high-dose dopamine, dobutamine and norepinephrine. Intraaortic balloon pumping was initiated after the patient's condition stabilized. She underwent emergency mitral valve replacement with a prosthetic valve. Complete rupture of the anterior papillary muscle was confirmed. Histological examination revealed necrosis of the anterior papillary muscle with inflammatory changes. She recovered uneventfully. Postoperative coronary angiography demonstrated subtotal occlusion of the first diagonal branch, and left ventriculography demonstrated akinesis of the lateral segment. This was a rare case in which subtotal occlusion of the first diagonal branch caused rupture of an anterior papillary muscle leading to severe mitral regurgitation.
Takahashi
Tohru
T
Division of Cardiology, International Medical Center of Japan, Tokyo.
Kohno
Koji
K
Kashida
Mitsuo
M
Morita
Toyohiko
T
Saito
Kiyoshi
K
Kamei
Akiko
A
Seo
Yujong
Y
Kawamura
Itta
I
Kojima
Taro
T
Seki
Yutaka
Y
Saito
Kan
K
Kumagai
Kenta
K
Ohno
Kunihiko
K
Tanaka
Yuriko
Y
Itaoka
Yoshinori
Y
Okazaki
Osamu
O
Izumo
Kazuhide
K
Kimura
Sosuke
S
Akatsuka
Nobuharu
N
Yazaki
Yoshio
Y
D000368:Aged; D000369:Aged, 80 and over; D003128:Coma; D017023:Coronary Angiography; D017548:Echocardiography, Transesophageal; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000209:etiology* / Q000601:surgery; D009203:Myocardial Infarction / Q000150:complications* / Q000473:pathology / Q000601:surgery; D010210:Papillary Muscles / Q000473:pathology; D012770:Shock, Cardiogenic / Q000209:etiology* / Q000601:surgery; D016896:Treatment Outcome