HeartRhythm Case Reports

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HeartRhythm Case Reports Supraventricular tachycardia triggering polymorphic ventricular tachycardia Ad WGJ. Oomen, MD, Bart Hooft van Huysduynen, MD, PhD, Raymond W. Sy, MBBS, PhD, FHRS HeartRhythm Case Reports DOI: 10.1016/j.hrcr.2019.07.005 Copyright © 2019 Terms and Conditions

Fig 1 Patient 1. 1A: Rhythm strip on admission showing supraventricular tachycardia of 250 bpm, triggering polymorphic VT. This run of polymorphic VT lasted 13.2 seconds and converted to sinus rhythm spontaneously. The coupling interval of the initiating beat was 310 ms. Following conversion to sinus rhythm multiple PVCs were observed with 2 morphologies. The first PVC had a right inferior axis whereas the subsequent PVCs had left superior axis (similar to the PVC initiating PMVT). 1B: Normal 12-lead ECG during sinus rhythm. HeartRhythm Case Reports DOI: (10.1016/j.hrcr.2019.07.005) Copyright © 2019 Terms and Conditions

Fig 2 Patient 2. 2A: 12-Lead ECG showing very rapid regular tachycardia of 250 bpm with typical RBBB. 2B: Single lead (lead II) rhythm strip showing regular SVT at a rate of 250 bpm degenerating into polymorphic VT 12.5 sec of duration. The coupling interval of the first VT beat is 230 ms. This episode terminates spontaneously into sinus tachycardia. 2C: 12-Lead ECG post spontaneous reversion to sinus rhythm. HeartRhythm Case Reports DOI: (10.1016/j.hrcr.2019.07.005) Copyright © 2019 Terms and Conditions

Figure 3 Patient 3. 3A: Rhythm strip at presentation, demonstrating regular SVT of 260 bpm triggering a run of polymorphic VT lasting for 8.5 sec before spontaneous termination. The coupling interval of the initiating beat is 220 ms. 3B: Baseline 12-lead ECG during sinus rhythm. HeartRhythm Case Reports DOI: (10.1016/j.hrcr.2019.07.005) Copyright © 2019 Terms and Conditions