title: Atypical atrioventricular nodal reentry tachycardia in a child with polyvalvular dysplasia.
abstract: A 10-year-old boy with polyvalvular dysplasia and severe involvement of both atrioventricular valves presented with palpitations. Concern was raised for atrial tachyarrhythmia due to biatrial enlargement; however, ambulatory monitoring discovered a reentrant mechanism. Electrophysiology study revealed atypical atrioventricular nodal reentrant tachycardia involving two components of the slow pathway, with inputs in the posterior septum around his dysplastic tricuspid valve. He underwent successful modification of the slow pathway using cryoablation.
authors.affiliation: 1Department of Pediatrics/Division of Pediatric Cardiology,Mayo Clinic,Rochester,Minnesota,United States of America.
authors.forename: Jonathan N
authors.initials: JN
authors.lastname: Johnson
authors.affiliation: 1Department of Pediatrics/Division of Pediatric Cardiology,Mayo Clinic,Rochester,Minnesota,United States of America.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Ackerman
authors.affiliation: 1Department of Pediatrics/Division of Pediatric Cardiology,Mayo Clinic,Rochester,Minnesota,United States of America.
authors.forename: Bryan C
authors.initials: BC
authors.lastname: Cannon
mesh_terms: D000015:Abnormalities, Multiple / Q000503:physiopathology*; D017115:Catheter Ablation / Q000379:methods*; D002648:Child; D003452:Cryosurgery / Q000379:methods*; D004562:Electrocardiography; D004594:Electrophysiology; D006351:Heart Valves / Q000002:abnormalities*; D006801:Humans; D008297:Male; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy*; D013617:Tachycardia, Supraventricular / Q000209:etiology / Q000628:therapy; D016896:Treatment Outcome
keywords: congenital polyvalvular dysplasia