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. Author manuscript; available in PMC: 2021 Mar 6.
Published in final edited form as: Nat Rev Dis Primers. 2020 Jul 16;6(1):58. doi: 10.1038/s41572-020-0188-7

Fig. 6 |. Catecholaminergic polymorphic ventricular tachycardia exercise test.

Fig. 6 |

Exercise stress test in a patient with catecholaminergic polymorphic ventricular tachycardia as confirmed by genetic analysis. Sinus rhythm was normal at rest, with ectopy increasing with exercise. The patient demonstrated single premature ventricular contractions (PVCs) (arrow) with increasing frequency as the heart rate (HR) progressively increased, transitioning to PVCs in bigeminy (dotted circle in stage 3) with couplets (dotted circle in stage 4) and triplets at peak exercise. Ectopy disappears after 5 min of recovery, and normal sinus rhythm is restored. bpm, beats per minute.