Atrioventricular block differential diagnosis

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Edzel Lorraine Co, DMD, MD[2]

• Atrioventricular (AV) blocks must be differentiated from other heart rhythm abnormalities. The temporal association of the P waves, nature of the QRS complexes, and irregularities of RR interval can help in distinguishing AV block from other arrhythmias.

• Atrioventricular block can be differentiated from atrioventricular dissociation, junctional rhythm, and multifocal atrial tachycardia based on their echocardiographic characteristics.
• Below is a table depicting properties of each arrhythmia.

Cardiology