Mitsuharu Kawamura et al. JACEP 2016;2:596-602 Holter Recording in a Patient With Incessant SVT Leading to Mild Decrease in Ejection Fraction The patient has long RP interval tachycardia with negative P-wave in the inferior leads and spontaneous initiation and termination in the QRS complex. SVT initiated with slight changes in sinus rate with varying coupling intervals. This is consistent with a diagnosis of permanent form of junctional reciprocating tachycardia, atrial tachycardia, and atypical AVNRT. AVNRT = atrioventricular nodal re-entrant tachycardia; SVT = supraventricular tachycardia. Mitsuharu Kawamura et al. JACEP 2016;2:596-602 American College of Cardiology Foundation