Table 5.

Classification and description of atrioventricular block in mice

Atrioventricular (AV) block classification		Description
1° Degree AV Block		PR prolongation without dissociation from QRS complex
2° Degree AV Block	Mobitz Type I	Partial dissociation between P wave and QRS complex as evidenced by intermittent absence of QRS complex following a P wave with gradual PR interval prolongation
	Mobitz Type II	Partial dissociation between P wave and QRS complex as evidenced by intermittent absence of QRS complex following a P wave with consistent PR interval
3° Degree AV Block		Complete dissociation between P wave and QRS complex most evidenced by distinct PP and RR intervals