• Eliana Aversa, Claudio A Muratore, M Laura Nemesio, Maria Cristina Tentori, and Miguel Payaslian.
• Servicio de Cardiología, Hospital Fernández, Buenos Aires, Argentina. Electronic address: eliana_aversa@yahoo.com.
• Arch Cardiol Mex. 2015 Oct 1; 85 (4): 278-83.

IntroductionTranscatheter aortic valve implantation (TAVI) is currently reserved for patients with symptomatic aortic stenosis and high surgical risk. One major limiting factor related to TAVI procedural complications is conduction abnormalities and the need for permanent pacemaker implantation.ObjectivesEvaluate the incidence of new conduction disturbances and pacemaker indications in patients with TAVI CoreValve® prosthesis (Medtronic Inc. Minneapolis, Minnesota, United States).MethodsWe included 28 patients, mean age 80 years. ECG parameters were evaluated previous and after implantation. All patients were monitorized during TAVI. Follow up Holter monitoring was performed at one, 6 and 12 months after the procedure and we also evaluated telemetry of implanted pacemaker.ResultsIn previous ECG we found 7 patients had right bundle branch block and 7 patients had left bundle brunch block (LBBB). The post implant ECG showed 7 new LBBB: 3 during valvuloplasty and 4 on the end of it. Six patients required pacemaker implantation for permanent or paroxysmal complete AV block (CAVB). At one year follow up, 3 patients with LBBB during valvuloplasty had a normal ECG, one still had LBBB and one an asymptomatic CAVB found in Holter monitoring.ConclusionsConduction abnormalities are frequent after CoreValve® aortic valve prosthesis implantation. The incidence of new LBBB was 25%. CAVB during or post TAVI require PM implantation. New LBBB may need a closer follow up because in a 3% of the cases it may progress to CAVB.Copyright © 2014 Instituto Nacional de Cardiología Ignacio Chávez. Published by Masson Doyma México S.A. All rights reserved.

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