PMC10201641_01
Twelve-lead electrocardiogram showing complete heart block with junctional escape rhythm, atrial rate of 75/minute, and ventricular rate of 40/minute.
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Admission electrocardiogram (ECG; Figure 1) showed complete heart block characterized by AV dissociation with a narrow QRS junctional escape rhythm, atrial rate of 75/minute, and ventricular rate of 40/minute.
Twelve-lead electrocardiogram showing 2:1 atrioventricular heart block with ventricular rate of 42/minute and atrial rate of 90/minute.
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After initiating intravenous dopamine infusion, ECG (Figure 2) demonstrated the rhythm converted to 2:1 AV heart block, atrial rate of 90/minute, and ventricular rate of 42/minute.
Echocardiogram showing symmetrical regional wall abnormalities extending into the apical inferior and lateral wall with hypokinesia of the LV.. Abbreviations: LV, left ventricle; EF, ejection fraction; ESV, end-systolic volume; LA, left atrium.
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Transthoracic echocardiogram (Figure 3) was significant for an ejection fraction of 41%-45%, mild mitral regurgitation, and evidence of regional wall abnormalities, mid and distal anteroseptal, apical, apical lateral, and inferoapical akinesia, consistent with TTC.