This ECG has both second degree AV block with 2:1 block and second degree type I ... Note the irregular R-R intervals making 3rd degree heart block unlikely. The rhythm on this ECG needs to ...

This is called 2:1 AV block ... nodal conduction and help distinguish these two. If second-degree type I AV block is present, then the heart rate will increase and the progressive prolongation ...

This type is often asymptomatic and discovered incidentally. Second-degree heart block: Some signals fail to reach the ventricles, causing missed beats. It is divided into two types: Mobitz type I ...