PMC9676225_01
(A) ECG on admission to hospital: sinus tachycardia 113 bpm, normal cardiac axis, T-waves inversion in leads V1 - V3; (B) Recording from Apple Watch: narrow QRS complex tachycardia of 216 bpm with short RP interval.
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F1
ECG showed sinus tachycardia 113 bpm, normal cardiac axis, and T-waves inversion in leads V1:V3 (Figure 1A). The recording showed narrow QRS complex tachycardia of 216 bpm and short RP interval (Figure 1B), and atrioventricular nodal reentrant tachycardia (AVNRT) was recognized.