title: [Pacemaker lead-induced tricuspid stenosis: a report of two cases].
abstract: Tricuspid stenosis (TS) is an uncommon complication of transvenous ventricular pacemaker implantation, with few cases reported in the literature. The mechanisms described are obstruction of right ventricular inflow by tricuspid vegetations (endocarditis), multiple pacemaker leads and tricuspid valve (TV) fibrosis secondary to perforation or laceration of the TV leaflets, or adherence between redundant portions of the lead and valvular and subvalvular tissue. We report two cases of severe TS, with different etiologies and management: one caused by leaflet perforation, resolved surgically, and the other secondary to fusion between a loop of the pacemaker lead and the subvalvular apparatus, which was treated medically.
authors.affiliation: Serviço de Cardiologia, Centro Hospitalar de Trás-os-Montes e Alto Douro, Unidade de Vila Real, Vila Real, Portugal. hjmribeiro@gmail.com
authors.forename: Hélder
authors.initials: H
authors.lastname: Ribeiro
authors.forename: Pedro
authors.initials: P
authors.lastname: Magalhães
authors.forename: Catarina
authors.initials: C
authors.lastname: Ferreira
authors.forename: Ana
authors.initials: A
authors.lastname: Baptista
authors.forename: Renato
authors.initials: R
authors.lastname: Margato
authors.forename: Sofia
authors.initials: S
authors.lastname: Carvalho
authors.forename: Policarpo
authors.initials: P
authors.lastname: Rosa
authors.forename: Pedro
authors.initials: P
authors.lastname: Mateus
authors.forename: Alberto
authors.initials: A
authors.lastname: Ferreira
authors.forename: J Ilídio
authors.initials: JI
authors.lastname: Moreira
mesh_terms: D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D014264:Tricuspid Valve Stenosis / Q000209:etiology*