Third-degree AV block is indicated by a bradyarrhythmia with no relationship between P waves and QRS complexes and more P waves than QRS complexes; the escape rhythm can be Junctional with normal AV conduction (narrow QRS complex) Junctional with aberrant AV conduction (wide QRS complex) Ventricular (wide QRS complex) Absence of second - or third-degree AV block is indicated by a regular QRS bradyarrhythmia with a 1: 1 relationship between P waves and QRS complexes.