Prognostic Benefit of Optimum Left Ventricular Lead Position in Cardiac Resynchronization Therapy

被引:50
作者
Kydd, Anna C. [1 ]
Khan, Fakhar Z. [1 ]
Watson, William D. [1 ]
Pugh, Peter J. [1 ]
Virdee, Munmohan S. [2 ]
Dutka, David P. [1 ]
机构
[1] Univ Cambridge, Dept Cardiovasc Med, Addenbrookes Hosp, Cambridge CB2 0QQ, England
[2] Papworth Hosp, Dept Cardiol, Cambridge CB3 8RE, England
关键词
cardiac resynchronization; long-term outcome; speckle-tracking echocardiography; CHRONIC HEART-FAILURE; SPECKLE-TRACKING ECHOCARDIOGRAPHY; LONG-TERM SURVIVAL; MAGNETIC-RESONANCE; TASK-FORCE; FOLLOW-UP; DYSSYNCHRONY; PLACEMENT; TRIAL; GUIDELINES;
D O I
10.1016/j.jchf.2013.11.010
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objectives This study was conducted to assess the impact of left ventricular (LV) lead position on longer-term survival after cardiac resynchronization therapy (CRT). Background An optimal LV lead position in CRT is associated with improved clinical outcome. A strategy of speckle-tracking echocardiography can be used to guide the implanter to the site of latest activation and away from segments of low strain amplitude (scar). Long-term, prospective survival data according to LV lead position in CRT are limited. Methods Data froma follow-up registry of 250 consecutive patients receiving CRT between June 2008 and July 2010 were studied. The study population comprised patients recruited to the derivation group and the subsequent TARGET (Targeted Left Ventricular Lead Placement to guide Cardiac Resynchronization Therapy) randomized, controlled trial. Final LV lead position was described, in relation to the pacing site determined by pre-procedure speckle-tracking echocardiography, as optimal (concordant/adjacent) or suboptimal (remote). All-cause mortality was recorded at follow-up. Results An optimal LV lead position (n = 202) conferred LV remodeling response superior to that of a suboptimal lead position (change in LV end-systolic volume: -24 +/- 15% vs. -12 +/- 17% [p < 0.001]; change in ejection fraction: +7 +/- 8% vs. +4 +/- 7% [p = 0.02]). During long-term follow-up (median: 39 months; range: < 1 to 61 months), an optimal LV lead position was associated with improved survival (log-rank p = 0.003). A suboptimal LV lead placement independently predicted all-cause mortality (hazard ratio: 1.8; p = 0.024). Conclusions An optimal LV lead position at the site of latest mechanical activation, avoiding low strain amplitude (scar), was associated with superior CRT response and improved survival that persisted during follow-up. (C) 2014 by the American College of Cardiology Foundation
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收藏
页码:205 / 212
页数:8
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