Schweitzer P, Mark H
Cardiology. 1978;63(4):208-11. doi: 10.1159/000169899.
In a patient with Wolff-Parkinson-White syndrome, transient normalization of the QRS complex occurred as a result of retrograde concealed conduction into the accessory pathway from an A-V junctional escape beat. This patient also had a bradycardia-tachycardia syndrome.