title: Accessory pathway reciprocating tachycardia involving twin AV nodes in a patient with atrioventricular discordance and mitral atresia.
abstract: The atrioventricular (AV) conduction system in AV discordance remains unclear, especially in cases with complex cardiac anomaly. We report a case of accessory pathway reciprocating tachycardia in atrioventricular discordance (AVD) and mitral atresia with twin AV nodes. In this case, the anterior AV node was located along the atretic mitral valve. The anterior AV node was involved in tachycardia and the posterior AV node acted as a bystander during tachycardia. The anterior AV node in AVD can be located along the atretic mitral valve, and one of twin AV nodes might act as a bystander during AV reciprocating tachycardia.
authors.affiliation: Department of Pediatric Cardiology, National Cardiovascular Center, Osaka, Japan. ayamiya@hsp.ncvc.go.jp
authors.forename: Aya
authors.initials: A
authors.lastname: Miyazaki
authors.forename: Heima
authors.initials: H
authors.lastname: Sakaguchi
authors.forename: Takamichi
authors.initials: T
authors.lastname: Uchiyama
authors.forename: Takashi
authors.initials: T
authors.lastname: Kurita
authors.forename: Hideo
authors.initials: H
authors.lastname: Ohuchi
authors.forename: Osamu
authors.initials: O
authors.lastname: Yamada
mesh_terms: D055011:Ablation Techniques; D001283:Atrioventricular Node / Q000002:abnormalities* / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D008297:Male; D008943:Mitral Valve / Q000002:abnormalities* / Q000503:physiopathology*; D054139:Tachycardia, Reciprocating / Q000503:physiopathology*