Course: “Narrow-Wide-Narrow” QRS Complex Tachycardia—Beware the Smartwatch Monsters
CME Credits: 1.00
Released: 2023-05-15
A young adult patient was referred to our Arrhythmic Unit for palpitations associated with chest pain and lightheadedness. The patient's anamnesis revealed no previous arrhythmic episodes or family history of sudden cardiac death. The physical examination results were unremarkable. The results of laboratory tests, a 12-lead electrocardiogram (ECG), and transthoracic echocardiography were normal. The patient’s smartwatch (Apple Watch Series 5, watchOS 6.2.8; Apple Inc) recorded a narrow QRS regular tachycardia triggering a nonsustained phase of wide complex irregular tachycardia; finally, the tachycardia again assumes a wide complex configuration until spontaneous termination occurs some beats later ().
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