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KMID : 0882420150890010074
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Korean Journal of Medicine
2015 Volume.89 No. 1 p.74 ~ p.78
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Reversible Atrioventricular Block after Electrical Injury
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Lee Ji-Young
Rhyou Hyo-In
Choi Won-Jong
Jung Hyo-Jin
Lee Seul
Park Jong-Sung
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Abstract
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Here, we report a case of electrical injury-induced reversible advanced second-degree atrioventricular (AV) block. A 28-year-old male visited the emergency department for palpitations 3 days after receiving an electrical injury from 220 volt alternating current. The initial electrocardiogram (ECG) showed sinus rhythm and first-degree AV block with a prolonged PR interval of 400 ms. There was no structural heart disease or electrolyte imbalance. Follow up ECGs acquired 4-6 days after the electrical injury showed intermittent AV block with a prolonged PR interval of 400-460 ms. Exercise treadmill and atropine provocation tests performed 6 days after electrical injury induced advanced second-degree AV block. His bundle electrogram showed intermittent AH block in a Wenckebach pattern with a prolonged AH interval of 220-360 ms and a normal HV interval. Episodes of AV block decreased remarkably 4 weeks after the electrical injury, and the prolonged PR interval returned to 220 ms after 5 months.
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KEYWORD
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Electricity, Atrioventricular block
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