There does appear to be a prolonging PR interval before some dropped beats (second degree type I ... conducted (2:1 AV block). Note the irregular R-R intervals making 3rd degree heart block ...

Unlike first-degree AV nodal block, a 1:1 P wave to QRS complex ratio is not maintained. Second degree type I AV block is specifically characterized by increasing delay of AV nodal conduction ...

It’s the least severe type of heart block. Second degree ... but they are completely independent of one another. Third-degree heart block is a medical emergency. If you or someone else has ...