Author + information
- Received December 16, 2011
- Revision received March 19, 2012
- Accepted March 26, 2012
- Published online May 1, 2012.
- Antonio J. Muñoz-García, MD, PhD⁎ (, )
- José M. Hernández-García, MD, PhD,
- Manuel F. Jiménez-Navarro, MD, PhD,
- Juan H. Alonso-Briales, MD,
- Antonio J. Domínguez-Franco, MD,
- Julia Fernández-Pastor, MD,
- Jose Peña Hernández, MD,
- Alberto Barrera Cordero, MD,
- Javier Alzueta Rodríguez, MD, PhD and
- Eduardo de Teresa-Galván, MD, PhD
- ↵⁎Reprint requests and correspondence:
Dr. Antonio J. Muñoz-García, Department of Cardiology, Virgen de la Victoria Clinical University Hospital, Campus de Teatinos s/n, 29010 Málaga, Spain
Objectives The purpose of this study was to evaluate the need for a permanent pacemaker after transcatheter aortic valve implantation with the CoreValve prosthesis (Medtronic, Inc., Minneapolis, Minnesota) using the new Accutrak delivery system (Medtronic, Inc.).
Background The need for a permanent pacemaker is a recognized complication after transcatheter aortic valve implantation with the CoreValve prosthesis.
Methods Between April 23, 2008 and May 31, 2011, 195 consecutive patients with symptomatic aortic valve stenosis underwent transcatheter aortic valve implantation using the self-expanding CoreValve prosthesis. In 124 patients, the traditional delivery system was used, and in 71 patients, the Accutrak delivery system was used.
Results There were no significant differences in baseline electrocardiographic characteristics between the traditional system and the Accutrak patients: PR interval: 153 ± 46 mm versus 165 ± 30 mm, p = 0.12; left bundle branch block: 22 (20.2%) versus 8 (12.7%), p = 0.21; right bundle branch block: 21 (19.3%) versus 8 (12.7%), p = 0.26. The depth of the prosthesis in the left ventricular outflow tract was greater with the traditional system than with the Accutrak system (9.6 ± 3.2 mm vs. 6.4 ± 3 mm, p < 0.001) and the need for a permanent pacemaker was higher with traditional system than with Accutrak (35.1% vs. 14.3%, p = 0.003). The predictors of the need for a pacemaker were the depth of the prosthesis in the left ventricular outflow tract (hazard ratio [HR]: 1.2, 95% confidence interval [CI]: 1.08 to 1.34, p < 0.001), pre-existing right bundle branch block (HR: 3.5, 95% CI: 1.68 to 7.29, p = 0.001), and use of the traditional system (HR: 27, 95% CI: 2.81 to 257, p = 0.004).
Conclusions The new Accutrak delivery system was associated with less deep prosthesis implantation in the left ventricular outflow tract, which could be related to the lower rate of permanent pacemaker requirement.
Drs. Hernández-García and Alonso-Briales are physician proctors for Medtronic, Inc. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.
- Received December 16, 2011.
- Revision received March 19, 2012.
- Accepted March 26, 2012.
- 2012 American College of Cardiology Foundation