SUMMARY Here we report a case of a 5-year-old boy with Ebstein anomaly and supraventricular tachycardia. He was diagnosed with Ebstein anomaly at the age of 3 months during the workup for afebrile convulsions, and has been followed by a pediatric cardiologist since. Electrocardiography recorded a small Rr` pattern in V1 on a few occasions, without other abnormalities. At the age of 2.5 years, the first episode of supraventricular tachycardia was recorded and stopped with adenosine. He was started on atenolol and was asymptomatic until a year later when he presented with the second recorded supraventricular tachycardia. He was referred to our institution for an electrophysiology study with ablation. Tachycardia was entrained and all the maneuvers were in accordance with atrioventricular reentry tachycardia. Tricuspid annulus was mapped during tachycardia. The earliest atrial signals appeared in the posteroseptal region of the valve, mechanical blocking of the tachycardia was recorded in that region, and early fractionated signal was present during ventricular retrograde pacing. The pathway was successfully ablated. Basal electrocardiogram was without change after ablation and the patient did not experience recurrence of tachycardia during follow-up. This case shows the efficacy and importance of ablation in Ebstein anomaly, without x-ray or intracardiac echocardiography.

Aim/Hypothesis. To examine whether children with DMT1 are less physically fit than healthy children and to assess whether an elevated level of HbA1c was associated with decreased physical fitness among children with diabetes. Methods. The study was conducted using case-control methodology. The cases were 100 children with T1DM, 7–17,9 years. Study subjects underwent a 6MWT, where distance measured, heart rate, and oxygen saturation was recorded. Results. Results of the 6MWT for children with T1DM and controls were 601.3 ± 86.1 meters versus 672.1 ± 60.6 meters, respectively (P < 0.001). The cases were divided into two subgroups, one with HbA1c levels >8% and one with HbA1c <8%. Results for both groups were inferior to the controls (P < 0.001). The posttest pulse rate in all subjects was higher than the pretest pulse rate (P < 0.001). Pulse oxygen levels were lower than controls at the pretest measurement (P < 0.001), and for both cases and controls, pulse oxygen levels decreased after test (P = 0.004). However, the change in oxygen saturation did not differ between the groups (P = 0.332). Conclusions. Children with T1D are less fit than matched controls. The level of HbA1c did not affect the physical fitness of children with T1D.