Cardiac resynchronization with sequential biventricular pacing for the treatment of moderate-to-severe heart failure

被引:147
|
作者
León, AR
Abraham, WT
Brozena, S
Daubert, JP
Fisher, WG
Gurley, JC
Liang, CS
Wong, G
机构
[1] Emory Univ, Carlyle Fraser Heart Ctr, Div Cardiol, Atlanta, GA 30322 USA
[2] Univ Kentucky, Lexington, KY USA
[3] Ohio State Univ, Ctr Heart, Columbus, OH 43210 USA
[4] Univ Rochester, Med Ctr, Rochester, NY 14642 USA
[5] Northwestern Univ, Evanston, IL USA
[6] Univ Penn, Philadelphia, PA 19104 USA
[7] Cardiac Solut, Peoria, AZ USA
关键词
D O I
10.1016/j.jacc.2005.08.032
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
OBJECTIVES The InSync III study evaluated sequential cardiac resynchronization therapy (CRT) in patients with moderate-to-severe heart failure and prolonged QRS. BACKGROUND Simultaneous CRT improves hemodynamic and clinical performance in patients with moderate-to-severe heart failure (HF) and a wide QRS. Recent evidence suggests that sequentially stimulating the ventricles might provide additional benefit. METHODS This multicenter, prospective, nonrandomized, six-month trial enrolled a total of 422 patients to determine the effectiveness of sequential CRT in patients with New York Heart Association (NYHA) functional class III or IV HF and a prolonged QRS. The study evaluated: whether patients receiving sequential CRT for six months experienced improvement in 6-min hall walk (6MHW) distance, NYHA functional class, and quality of life (QoL) over control group patients from the reported Multicenter InSync Randomized Clinical Evaluation (MIRACLE) trial; whether sequential CRT increased stroke volume compared to simultaneous CRT; and whether an increase in stroke volume translated into greater clinical improvements compared to patients receiving simultaneous CRT. RESULTS InSync III patients experienced greater improvement in 6MHW, NYHA functional class, and QoL at six months compared to control (all p < 0.0001). Optimization of the sequential pacing increased (median 7.3%) stroke volume in 77% of patients. No additional improvement in NYHA functional class or QoL was seen compared to the simultaneous CRT group; however, InSync III patients demonstrated greater exercise capacity. CONCLUSIONS Sequential CRT provided most patients with a modest increase in stroke volume above that achieved during simultaneous CRT. Patients receiving sequential CRT had improved exercise capacity, but no change in functional status or QoL.
引用
收藏
页码:2298 / 2304
页数:7
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