Inducibility of intra-atrial reentrant tachycardia after the first two stages of the Fontan sequence
Ian H. Law, MDa,
Peter S. Fischbach, MDa,
Caren Goldberg, MDa,
Ralph S. Mosca, MD, FACCa,
Edward L. Bove, MD, FACCa,
Thomas R. Lloyd, MD, FACCa,
Albert P. Rocchini, MD, FACCa and
Macdonald Dick, II, MD, FACCa
a University of Michigan Congenital Heart Center and Departments of Pediatrics and Surgery, University of Michigan Health Systems, Ann Arbor, Michigan, USA

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Figure 1 A representative surface electrocardiogram (ECG) and mid-right atrial intracardiac tracing (RA 12) from a study participant. The left panel demonstrates sinus rhythm. The right panel demonstrates IART with low amplitude, biphasic p waves in lead I and upright, nonsinus p waves in leads II and III, along with 2:1 atrioventricular conduction. I = ECG lead I; II = lead II; III = lead III; aVR = lead aVR; aVL = lead aVL; aVF = lead aVF; RA = right atrial electrogram; A = atrial electrogram; V = ventricular electrogram.
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