title: Diagnostic and Prognostic Implications of Surface Recordings from Patients with Atrioventricular Block.
abstract: The atrioventricular (AV) bridge is vulnerable to many circumstances that depress conduction. Abnormal impulse transmission may be caused by drugs, autonomic effects, or destructive processes. Type 1 (Wenckebach) AV block is owing to depressed AV nodal conduction and is recognized by a prolonging PR interval ending in a "dropped beat." Type II (Mobitz) AV block is owing to abnormal infranodal conduction, and is usually accompanied by bundle branch block. Second-degree AV block with 2:1 conduction can be a difficult problem. Third-degree (complete) AV block is a diagnosis too often rendered and too often incorrect.
authors.forename: William P
authors.initials: WP
authors.lastname: Nelson
mesh_terms: D000368:Aged; D054537:Atrioventricular Block / Q000145:classification / Q000175:diagnosis / Q000503:physiopathology; D004562:Electrocardiography / Q000145:classification / Q000379:methods; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged
keywords: Atrioventricular block; Complete AV block; Mobitz block; Wenckebach block