Myocarditis is a STEMI mimic that can cause nonspecific ST and T changes. It may also cause sinus tachycardia, AV blocks, ventricular arrhythmias, QRS and QT prolongation. There may also be signs of pericarditis.See also: Other
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This ECG is from a woman in her 40s who presented with chest pain that had been waxing and waning over the past 24 hours. She had a history of renal failure on dialysis, hypertension, diabetes and a normal catheterisation a year ago. This was her initial ECG.
This ECG shows sinus tachycardia with nonspecific intraventricular delay, tall QRS and widespread PR segment depression. The ST segments are all discordant apart from V4 and V1. These changes were dynamic over serial ECGs. The cath was again normal. Echo showed a trace of pericardial effusion. The diagnosis was myopericarditis.