Arrhythmia in an athlete diagnosed by smartphone electrocardiogram: a case report

Figures

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  Figure 1. The rugby player’s resting 12-lead electrocardiogram, which is considered to be normal electrocardiogram for an athlete.

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  Figure 2. Results of the exercise stress test, which revealed a normal blood pressure and heart rate increase with exercise. There were no inducible arrhythmias.

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  Figure 3. Single lead trace from the AliveCor® Kardia application, demonstrating a narrow complex tachycardia at 182 b.p.m.

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  Figure 4. Short RP narrow complex tachycardia at a paper speed of 25 mm/s.

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  Figure 5. Tachycardia induction by atrial extrastimuli. The intracardiac and precordial electrocardiogram traces, at a paper speed of 100 mm/s, show a pacing beat and jump due to block in the fast pathway and conduction down the slow pathway. This results in a short RP narrow complex tachycardia, consistent with AVNRT.

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  Figure 6. Post-ablation atrial extrastimuli at the same coupling intervals as Figure 5 no longer induced a tachycardia, demonstrating a successful ablation.

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