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Mobitz II (Second-Degree Atrioventricular Block)
Risk
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Occurs after anterior infarction and can quickly proceed to third-degree heart block
Perioperative Risks
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Risk of developing third-degree block
Worry About
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Rapid development into third-degree block, which requires temporary transvenous pacing
Overview
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Unlike Mobitz I block, Mobitz II block is located in bundle of His or bundle branches, resulting in lengthening QRS duration.
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PP and RR intervals are constant, and PR intervals are constant prior to the dropped QRS complex.
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