Exercise-induced ST-segment elevation in patients with a recent acute myocardial infarction treated by primary
Fabio Infusino1, Gaetano A Lanza, Claudio Larosa
1Istituto di Cardiologia, Università Cattolica del Sacro Cuore, Rome, Italy.
Objectives:
To get insight in the mechanism of exercise-induced ST-segment elevation (STE) in patients with Q/QS waves at the electrocardiogram (ECG).
Methods:
We performed exercise stress test in 13 patients with anterior acute myocardial infarction treated by successful primary percutaneous coronary intervention (PCI).
Results:
Compared to rest, an additional STE > or = 1 mm in one or more precordial ECG leads during exercise occurred in nine patients (69%), in the absence of symptoms.
Conclusions:
In acute myocardial infarction (MI) patients, treated by primary PCI and showing optimal coronary blood flow restoration at angiography, STE can still be induced by exercise in Q/QS wave ECG leads. This finding lends further support to the theory that exercise-induced STE in this clinical context is unlikely to represent by itself transient myocardial ischemia or viability.
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