ECG of the Month: Supraventricular Tachycardia: In Search of an Underlying Mechanism (JACC: Case Reports)
Editor's Note: This ECG of the Month was adapted from a JACC: Case Reports ECG Challenge. You can access the original article here.
A 63-year-old woman with a past medical history of hypertension presented to the emergency department with three months of recurrent palpitations. A 12-lead electrocardiogram (ECG) was obtained demonstrating a narrow complex tachycardia (Figure 1A).
Figure 1A: 12-Lead Electrocardiogram Demonstrates a Narrow Complex Tachycardia
Which is the diagnosis?