AV junctional rhythm

Cardiac rhythm initiated from spontaneous depolarization from with in AV node. Etiology: 1) myocardial ischemia or infarction 2) hypokalemia 3) AV node blocking agents a) digitalis toxicity b) beta-blockers c) Ca⁺² channel blockers Clinical manifestations: depend upon rate & underlying condition Special laboratory: - electrocardiogram: a) narrow complex b) regular rhythm @ 30-60/min c) p-waves may be present (PR interval < 0.12 sec), absent or retrograde Management: 1) correction of underlying etiology 2) cardiac pacing a) temporary if unstable b) permanent pacing may be necessary

References

Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 273