An 8-year-old boy attended the clinic for assessment of a murmur. He played football 3 times a week and was asymptomatic, with no personal or family history of interest. His blood pressure was 90/50mmHg. S1 and S2 were normal while S3 and S4 were absent. He had a 2/6 systolic murmur in the aortic area, without radiation.
What is the interpretation of the electrocardiogram recorded (figure 1)?
- 1.
Sinus bradycardia with short PR. Physiological adaptation to exercise
- 2.
Negative T waves are not normal until V4 and he presented prolonged QTc
- 3.
Complete atrioventricular block
- 4.
Isorhythmic atrioventricular dissociation of physiological origin, given the patient plays sports
Submit your answer to http://www.revespcardiol.org/en/electroreto/73/08. The answer will be published in the next issue (September 2020). #RetoECG.