Tolerance of Sustained Ventricular Fibrillation During Continuous-Flow Left Ventricular Assist Device Support

被引:6
|
作者
Baldwin, Andrew C. W. [1 ]
Gemmato, Courtney J. [1 ]
Sandoval, Elena [1 ]
Cohn, William E. [1 ]
Morgan, Jeffrey A. [1 ]
Frazier, O. H. [1 ]
机构
[1] Baylor Coll Med, Michael E DeBakey Dept Surg, Div Cardiothorac Transplant & Mech Circulator Su, CHI Baylor St Lukes Med Ctr,Texas Heart Inst, Houston, TX 77030 USA
来源
TEXAS HEART INSTITUTE JOURNAL | 2017年 / 44卷 / 05期
关键词
Arrhythmias; cardiac; assisted circulation; instrumentation; methods; disease-free survival; heart failure; therapy; heart-assist devices; recovery of function; survival rate; time factors; ventricular fibrillation; physiopathology;
D O I
10.14503/THIJ-16-5879
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The widespread use of continuous-flow left ventricular assist devices for mechanical circulatory support has shown that long-term hemodynamic support is possible, even when a clinical "pulse" cannot be detected. We present the incidental discovery of ventricular fibrillation in 6 alert, hemodynamically stable patients supported only by a continuous-flow device (HeartMate II, n=5; Jarvik 2000, n=1). Ventricular fibrillation was found in 3 patients during routine outpatient follow-up visits and in 3 awaiting discharge from the hospital after device placement. Diagnosis was confirmed by electrocardiographic and echocardiographic studies. The average duration of mechanical circulatory support before ventricular fibrillation occurred was 221 +/- 362 days (range, 5-864 d). All patients were conscious and ambulatory at the time of the arrhythmia. Three patients reported symptoms-primarily fatigue, nausea, and exertional dyspnea-that prompted evaluation. Serum chemistry analysis of blood drawn immediately after diagnosis showed no changes that suggested end-organ dysfunction. Three patients died of unrelated complications an average of 3.9 yr (range, 360-2,270 d) after the event. Two of the remaining 3 patients eventually underwent successful pump explantation, and one is on ongoing support. Our experience shows that it is possible for patients with continuous-flow left ventricular assist devices to remain hemodynamically stable while in ventricular fibrillation. Additional investigation is needed to determine whether defibrillator settings for these patients should be adjusted to limit delivery of shock therapy.
引用
收藏
页码:357 / 360
页数:4
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