Atrioventricular Block Differential Diagnoses
- Author: Chirag M Sandesara, MD; Chief Editor: Jeffrey N Rottman, MD more...
In making the diagnosis, it is important to differentiate Mobitz I second-degree atrioventricular (AV) block from Mobitz II second-degree AV block, as well as to differentiate Mobitz II second-degree AV block from third-degree AV block. Both Mobitz I and Mobitz II AV block must be differentiated from sinus nodal dysfunction.
Atrial fibrillation with a low heart rate may mask third-degree AV block. Third-degree block must be differentiated from AV dissociation, where the frequency of the ventricular rhythm exceeds the frequency of the atrial rhythm.
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