Abstract
Purpose
The purpose of this study was to evaluate electrophysiologic study (EPS) in risk stratification of relative indications for pacemaker implantation (PMI) after transcatheter aortic valve implantation (TAVI).
Methods
We reviewed files of all patients who had a left bundle branch block (LBBB) and underwent EPS after TAVI between 3/2009 and 5/2015. The indications for EPS were new-onset LBBB and the presence of an old or a new-onset LBBB associated with either PR prolongation after TAVI (∆PR >20 ms) or with “slow” atrial fibrillation (<100/min). Pacemakers were implanted when significant infranodal disease was demonstrated. The control group comprised of 55 consecutive patients who underwent TAVI and had an indication for an EPS per our definitions. These patients were discharged without further intervention. All patients were followed during 1 year for the composite endpoint of mortality or PMI after hospital discharge.
Results
Indications for EPS were new LBBB (n = 8, 30.8%), new LBBB + ∆PR >20 ms (n = 9, 34.6%), baseline LBBB + ∆PR >20 ms (n = 7, 26.9%) and new LBBB + slow AF <100 bpm (n = 2, 7.7%). Multilevel conduction disturbances involving the AV node (n = 19, 73.1%), the His (n = 3, 11.5%), and the infra-His system (n = 4, 15.4%) were found. Post discharge, there were 5 (9%) deaths and 3 (5.5%) PMI in the control group compared to none in the EPS group corresponding to event-free survival of 85 and 100%, respectively (p = 0.04).
Conclusions
Patients with LBBB with or without ∆PR >20 ms are at a higher risk of mortality and late PMI at 1-year follow-up. EPS can be used to safely identify patients in whom a PMI is needed.
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Informed consent was obtained from all individual participants included in the study, and the study was approved by the Institutional Ethics Committee.
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There was no funding for this study.
Conflict of interest
Dr. Finkelstein acts as a TAVI proctor and receives consultation fees from Medtronic cardiovascular (Minneapolis, Minnesota) and Edwards Lifesciences (Irvine, California). All other authors declare that they have no conflict of interest.
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Tovia-Brodie, O., Ben-Haim, Y., Joffe, E. et al. The value of electrophysiologic study in decision-making regarding the need for pacemaker implantation after TAVI. J Interv Card Electrophysiol 48, 121–130 (2017). https://doi.org/10.1007/s10840-016-0218-2
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DOI: https://doi.org/10.1007/s10840-016-0218-2