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Progressive familial heart block type II
Progressive familial heart block type II (PFHB2) is an autosomal dominant disorder, similar to type I progressive familial heart block (PFHB1; see 113900). The pattern of PFHB2, however, tends to develop along the lines of a sinus bradycardia with a left posterior hemiblock, presenting clinically as syncopal episodes, Stokes-Adams seizures, or sudden death when complete heart block supervenes (Brink and Torrington, 1977). [from OMIM]
Complete heart block with narrow QRS complexes
A type of third degree heart block in which the escape rhythm arises at the atrioventricular node, which produces a narrow QRS complex. [from HPO]
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