Dual Atrioventricular Nodal Non–Re-Entrant Tachycardia

Abstract

A patient presented with symptoms of palpitations. Her standard 12-lead electrocardiogram captured 3 potential causes of her symptoms (premature atrial contractions, junctional rhythm, and narrow complex tachycardia). Further workup uncovered dual atrioventricular node physiology with 1:2 sinus conduction and resultant alternating QRS from a slow and fast conduction pathway. (Level of Difficulty: Intermediate.)

Keywords

• ectopy
• electrocardiogram
• supraventricular arrhythmia