Fig. 1

ECG evolution during hospitalization—image 1 showing CHB with broad QRS complexes and T wave inversion in the inferior leads; image 2 and 3 showing sinus rhythm with left anterior fascicular block combined with complete right bundle branch block, deep T waves inversion from V1 to V6 and in the inferior leads and a prolonged QTc interval (500 ms). Image 3 after implanting dual chamber permanent pacemaker. Image 5 shows improvement in electrocardiographic changes, with QTc normalization