Rate dependent QS pattern in an acute Kawasaki disease.

Kawasaki disease (KD) is associated with pancarditis and complicated by coronary artery (CA) inflammation. In the present case, we were confronted with a very ill KD patient with first degree atrioventricular block and QS pattern on the electrocardiogram. This unusual pattern was transient and intermittent. It reflected a conduction disturbance in the context of an acute myocarditis rather than an immediate CA complication. We herein discuss the differential diagnoses of a rarely observed electrocardiographic finding in the young.