Enfarte agudo do miocárdio como forma de apresentação de mixoma gigante da aurícula esquerda

Abstract

Myxomas are the most common type of benign cardiac tumor. The most frequent clinical presentations are symptoms resulting from atrioventricular valve obstruction or systemic embolization. Coronary embolization is a rare, although real and potentially fatal, complication of cardiac myxomas. We present a case report and review of the literature on this disease association. A 57-year-old woman was admitted to our coronary care unit with a diagnosis of non-ST elevation acute myocardial infarction. Transthoracic echocardiography showed a large left atrial mass attached to the interatrial septum, coral-like and with a friable appearance, suggestive of myxoma. Coronary angiography revealed no significant lesions and the patient underwent surgical excision of the mass, which histological study showed to be compatible with myxoma. The postoperative period was uneventful and the patient is doing well, with no recurrence of myxoma.

Prognostic prediction of troponins in cardiac myxoma: case study with literature review

“…The troponin I was somewhat higher than the baseline value of coronary artery disease patients (1.0±6 µg/L) [ 9 ] or the baseline value of the patients with coronary and/or valvular disorders (0.16±0.05 µg/L) [ 10 ] reported in the literature. The functional atrioventricular valve obstruction and embolic phenomena predisposing to myocardial infarction in the presence of a cardiac myxoma might be the explanations of the remarkable rise of the baseline troponin values [ 25 ] .…”

Left atrial myxoma with coronary artery disease

“…In addition, myxomas can present as myocardial infarction secondary to arterial embolisation. 10 Transthoracic echocardiography is the initial modality, but transoesophageal echo is more sensitive. In cases of uncertainty,…”

“…Patients with myxoma can present with constitutional symptoms, dyspnoea, angina, syncope or embolic manifestations. In addition, myxomas can present as myocardial infarction secondary to arterial embolisation 10. Transthoracic echocardiography is the initial modality, but transoesophageal echo is more sensitive.…”