Second degree AV block natural history, complications and prognosis: Difference between revisions
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==Natural History== | ==Natural History== | ||
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Revision as of 02:00, 13 February 2013
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Raviteja Guddeti, M.B.B.S. [2]
Natural History
- Mobitz I second degree AV block, usually most of the times, involves the AV node (70%). In about 30% of the cases the site of block is infranodal. It is usually benign and rarely progresses to complete heart block.
- Mobitz II second degree Av block is due to block inferior to the AV node (infra-Hisian structures) and it progresses to complete heart block.
Complications
Prognosis
Mobitz type I second degree AV block is usually benign and carries a good prognosis compared to Mobitz type II. But Mobitz type I in the setting of an acute MI causes a significant rise in mortality. Mobitz II, as it involves the infra nodal structures, carries the risk of progression to complete heart block and carries an unfavorable prognosis.