AVB I:
It results in a prolongation of the PR interval (> 0.20 sec)
AVB II:
– Mobitz 1: Luciani-Wenckebach rate (progressive enlargement of the space PR -> P wave blocked). The headquarters of this block is usually supra-hissien (nodal)
– Mobitz 2: paroxysmal AV conduction block. The block of the seat is usually sub-hissien (His bundle or the branches)
– The Mobitz 2 can be confused with an atrial bigeminy with anterograde blocking extrasystole, in this case the interval PP ‘(between the normal wave P and P’ blocked) is not equal to half the PP interval.
AVB III:
– Complete atrioventricular dissociation rate. The frequency and morphology of the ventricular escape depend on the type of seat BAV. AVB III with pace quick exhaust (50 / min) and high QRS purposes is located (NAV or the top of the bundle of His) => jonctionel exhaust.
Ventricular escape => 30 / min and wide QRS
