Electrocardiographic changes in Takotsubo cardiomyopathy

Area of Science:

• Cardiology
• Internal Medicine
• Clinical Diagnostics

Background:

• Takotsubo cardiomyopathy (TC) is a transient, non-ischemic heart condition.
• TC symptoms mimic acute myocardial infarction (MI).
• Understanding ECG changes in TC is crucial for differential diagnosis.

Purpose of the Study:

• To evaluate electrocardiographic (ECG) changes in patients diagnosed with Takotsubo cardiomyopathy (TC).
• To determine the frequency of ST elevation and other ECG abnormalities in TC.
• To differentiate ECG findings in TC from those typically seen in acute anterior MI.

Main Methods:

• Retrospective analysis of 11 patients diagnosed with TC based on Mayo criteria.
• Review of daily 12-lead electrocardiograms (ECGs) during the first week of hospitalization.
• Correlation of ECG findings with coronary angiography and echocardiography results.

Main Results:

• ST elevation was observed in 8 of 11 patients; reciprocal ST depression occurred in 2.
• Diffuse, symmetric T-wave inversion was present in 8 patients, extending beyond single coronary artery territories.
• QTc interval prolongation was noted in 10 patients; pathological Q waves were found in 5, with 2 being transient.
• Left ventricular ejection fraction ranged from 25-35% and was not predictable by ECG changes.

Conclusions:

• ECG abnormalities in TC are distinctive and differ from acute anterior MI.
• Specific ECG patterns, including ST elevation and diffuse T-wave inversion, serve as key indicators for suspecting TC.
• Recognizing these ECG signatures aids clinicians in diagnosing TC within the appropriate clinical context.