Various maneuvers can be employed to distinguish between the two potential rhythms when an ECG reveals 2:1 AV nodal block: Carotid sinus massage or adenosine: This slows the sinus rate ...
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What to Know About the Different Types of BradycardiaBradycardia is a condition characterized by a slower than normal heart rate. While a normal adult heart beats between 60 and 100 times per minute, bradycardia is defined when heart rate falls below 60 ...
These mechanisms simulate type II second-degree AV nodal block. The clue to the diagnosis of AV nodal block is the presence of sinus slowing, no matter how slight, in the setting of a narrow QRS ...
and sinus rhythm replaces the ectopic atrial rhythm when the heart rate is increased during exercise. In Mobitz type I second-degree AV block, the PR interval progressively lengthens from beat to beat ...
The rhythm is either sinus rhythm or not sinus rhythm ... Note that when atrioventricular, or AV, dissociation is present (complete heart block or VT), as previously described, there may not ...
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