Long-Term Survival Case of Myocardial Infarction in a Cat

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  • 長期経過観察をし得た心筋梗塞の猫の1例
  • チョウキ ケイカ カンサツ オ シエタ シンキン コウソク ノ ネコ ノ 1レイ

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<p>Myocardial infarction (MI) is a disease that causes ischemic necrosis of the myocardium resulting from coronary artery thromboembolism. In cats, as the most common site for arterial thromboembolism is the iliac artery bifurcation, MI is a considerably rare condition. This paper describes a long-term survival case of acute MI (AMI) in a cat possibly due to an intracardiac thrombus. A 9-year old neutered female domestic shorthair cat was presented because of acute-onset vomiting and weakness. At the time of admission (day 1), electrocardiography showed ST-segment elevation in bipolar limb leads I and aVL, and depression in leads II, III, and aVF. Two-dimensional echocardiography revealed localized hypomotility in the left ventricular lateral wall. Elevated levels of cardiac troponin I, a cardiac biomarker, was also elevated. The cat was diagnosed as having AMI in the left ventricular lateral wall. The cat was managed relatively well with medical therapy for more than three months, but subsequently showed thinning, akinesis, and hyper-echogenicity in the left ventricular lateral wall on days 140 and 395, indicative of the progression of AMI to the later healing phase; that is, old MI (OMI). Despite a stable general condition, the cat died suddenly on day 407. The most significant pathological feature was OMI located mainly in the left ventricular lateral wall. The clinical and pathological findings resembled those of human MI in the left lateral wall of the heart.</p>

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