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Electrocardiograms from rats with isoproterenol hydrochloride treated group. Rats were subjected to ECG recording under ether anesthesia in the Biopac data acquisition mp150 device. The figure represents electrocardiograms for rats with myocardial infarction group showing (a) tachycardia, (b) QT prolongation and depressed ST, (c) ST-segment elevation, (d) ventricular premature beats, (e) abnormal Q wave, and (f) T wave changes.
