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Comparative Study
. 2005 Jan;69(1):89-94.
doi: 10.1253/circj.69.89.

Differentiation between patients with takotsubo cardiomyopathy and those with anterior acute myocardial infarction

Masaru Inoue  1 , Masami Shimizu, Hidekazu Ino, Masato Yamaguchi, Hidenobu Terai, Noboru Fujino, Kenji Sakata, Akira Funada, Ryozo Tatami, Syozo Ishise, Hounin Kanaya, Hiroshi Mabuchi
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Free article
Comparative Study

Differentiation between patients with takotsubo cardiomyopathy and those with anterior acute myocardial infarction

Masaru Inoue et al. Circ J. 2005 Jan.
Free article

Abstract

Background: There has not been a comparison of the electrocardiographic (ECG) finding of ST-segment elevation in the precordial leads in patients with takotsubo cardiomyopathy (TC) and those with anterior acute myocardial infarction (AMI), with regard to the location of the culprit lesion.

Methods and results: The present study evaluated 18 patients with TC, and 85 with anterior AMI who were divided into 3 groups: group A had the culprit lesion proximal to both the first septal branch (S1) and the first diagonal branch (D1), group B had the culprit lesion proximal to either S1 or D1, and group C had the culprit lesion distal to both S1 and D1. In patients with TC, reciprocal ST-segment depression in the inferior leads was observed less frequently than in patients in groups A (p<0.0001) and B (p=0.0002), and abnormal Q waves and ST-segment elevation in the inferior leads were observed more frequently than in group A (p=0.0007, p=0.0057, respectively). The ECG findings in TC did not differ from those in group C.

Conclusion: Electrocardiographic findings may differentiate TC from AMI with a proximal lesion of left anterior descending coronary artery, but not those with distal lesions.

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