The term ‘inconstant’ PR or AV intervals is important, as a large proportion of type I sequences are atypical and do not conform to the traditional mathematical behaviour of the PR intervals. For ...
2:1 atrioventricular block is a form of second-degree AV nodal block and occurs when every other P wave is not conducted through the AV node to get to the ventricles, and thus every other P wave ...
In second-degree atrioventricular nodal block — also known as Wenckebach block or Mobitz Type I AV block ... This is called 2:1 AV block, as depicted below: When 2:1 AV block is present ...