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. 2021 Jun 20;25(1):6–9. doi: 10.1016/j.jccase.2021.05.010

Fig. 1.

Fig. 1

Electrocardiogram (ECG) changes. The ECG obtained at the time of admission showed that the patient had sinus tachycardia with a heart rate of 126 bpm (a). After ivabradine treatment, the ECG showed sinus rhythm with the heart rate reduced to 65 bpm (b).