Universität zu Köln

Hoffmann, Rainer, Herpertz, Ralf, Lotfipour, Sara, Aktug, Oemer, Brehmer, Kathrin, Lehmacher, Walter, Autschbach, Ruediger, Marx, Nikolaus and Lotfi, Shahram (2012). Impact of a New Conduction Defect After Transcatheter Aortic Valve Implantation on Left Ventricular Function. JACC-Cardiovasc. Interv., 5 (12). S. 1257 - 1264. NEW YORK: ELSEVIER SCIENCE INC. ISSN 1936-8798

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Abstract

Objectives This study sought to evaluate the impact of new conduction defects after transcatheter aortic valve implantation (TAVI) on the evolution of left ventricular (LV) function during 1-year follow-up. Background New left bundle branch block (LBBB) or need for permanent pacing due to atrioventricular (AV) block are frequent after TAVI. Methods A total of 90 consecutive patients treated with TAVI and who had 12-month echocardiographic follow-up were included in the study. In 39 patients, a new conduction defect (new LBBB or need for permanent pacemaker activity.) persisted 1 month after TAVI. In 51 patients, no persistent new conduction defect was observed. Two-dimensional echocardiography using parasternal short-axis, apical 4-chamber, and apical 2-chamber views was performed before TAVI and at 1-year follow-up to determine LV volumes and ejection fraction based on Simpson's rule. Speckle-tracking echocardiography was applied using standard LV short-axis images to assess the effect of new conduction defects on time-to-peak radial strain of different LV segments as a parameter of LV dyssynchrony. Results New conduction defects resulted in marked heterogeneity in time-to-peak strain between the 6 analyzed short-axis segments. During 1-year follow-up after TAVI, there was a significant increase in left ventricular ejection fraction (LVEF) in patients without new LBBB (53 +/- 11% pre TAVI to 59 +/- 10% at follow-up; p < 0.001), whereas there was no change in LVEF in patients with a new conduction defect (52 +/- 11% pre TAVI to 51 +/- 12% at follow-up, p = 0.740). Change in LV endsystolic volume was also significantly different between patient groups (-1.0 +/- 14.2 vs. -11.2 +/- 15.7 ml, p = 0.042). New conduction defect and LVEF at baseline were independent predictors of reduced LVEF at 12-month follow-up after TAVI. Conclusions LVEF improves after TAVI for treatment of severe aortic stenosis in patients without new conduction defects. In patients with a new conduction defect after TAVI, there is no improvement in LVEF at follow-up. (J Am Coll Cardiol Intv 2012;5:1257-63) (C) 2012 by the American College of Cardiology Foundation

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hoffmann, Rainer UNSPECIFIED UNSPECIFIED UNSPECIFIED Herpertz, Ralf UNSPECIFIED UNSPECIFIED UNSPECIFIED Lotfipour, Sara UNSPECIFIED UNSPECIFIED UNSPECIFIED Aktug, Oemer UNSPECIFIED UNSPECIFIED UNSPECIFIED Brehmer, Kathrin UNSPECIFIED UNSPECIFIED UNSPECIFIED Lehmacher, Walter UNSPECIFIED UNSPECIFIED UNSPECIFIED Autschbach, Ruediger UNSPECIFIED UNSPECIFIED UNSPECIFIED Marx, Nikolaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Lotfi, Shahram UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-477458
DOI:	10.1016/j.jcin.2012.08.011
Journal or Publication Title:	JACC-Cardiovasc. Interv.
Volume:	5
Number:	12
Page Range:	S. 1257 - 1264
Date:	2012
Publisher:	ELSEVIER SCIENCE INC
Place of Publication:	NEW YORK
ISSN:	1936-8798
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BUNDLE-BRANCH BLOCK; HIGH-RISK PATIENTS; PERMANENT PACEMAKER IMPLANTATION; PERCUTANEOUS HEART-VALVE; TRACKING RADIAL STRAIN; ATRIOVENTRICULAR-BLOCK; COREVALVE PROSTHESIS; STENOSIS; REPLACEMENT; PREDICTORS Multiple languages Cardiac & Cardiovascular Systems Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47745