Orthodromic Atrioventricular Reentrant Tachycardia Masquerading as Atrial Fibrillation

Korean Circ J. 2008 Apr;38(4):235-236. 10.4070/kcj.2008.38.4.235.

Affiliations

¹Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea. mdjunkim@yanoo.co.kr

No abstract available.

MeSH Terms

Fig. 1 A 12-lead electrocardiogram of the induced tachycardia. RR interval varies beat by beat. It appears as atrial fibrillation. However, close inspection of lead I discloses retrogradely conducted P wave (arrow) with a negatively polarity. Number indicates RR interval (ms).
Fig. 2 Variation of atrioventricular reentrant tachycardia cycle length related to variability in the AH interval. The retrograde limb of this circuit is a left lateral accessory pathway as shown by the earliest retrograde atrial activation in distal coronary sinus. Anterograde conduction is totally irregular as indicted by variable AH interval. Upper and lower number indicate RR interval and AH interval. From top to bottom, surface electrocardiogram I, II, III and V1 together with high right arial electrogram (HRA), proximal to distal His bundle electrogram, right ventricular electrogram (RVA) and proximal to distal electrograms from the coronary sinus (CSp, CSd) were displayed.