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  • Title: Thresholds of physical activity and life expectancy for patients considering destination ventricular assist devices.
    Author: Stewart GC, Brooks K, Pratibhu PP, Tsang SW, Semigran MJ, Smith CM, Saniuk C, Camuso JM, Fang JC, Mudge GH, Couper GS, Baughman KL, Stevenson LW.
    Journal: J Heart Lung Transplant; 2009 Sep; 28(9):863-9. PubMed ID: 19716036.
    Abstract:
    BACKGROUND: Current implantable left ventricular assist devices (LVAD) improve survival and function for patients with very late stage heart failure (HF) but may also offer benefit before inotrope dependence. Debate continues about selection of HF patients for LVAD therapy. We sought to determine what level of personal risk and disability HF patients thought would warrant LVAD therapy. METHODS: The study included 105 patients with symptomatic HF and an LV ejection fraction (EF) < 35% who were given a written paragraph about LVADs and asked about circumstances under which they would consider such a device. New York Heart Association (NYHA) functional class, time trade-off utility, and patient-assessed functional score were determined. RESULTS: Participants (mean age, 58 years) had an LVEF of 21%. The median duration of HF was 5 years, and 65% had a primary prevention implantable cardioverter defibrillator. Presented with a scenario of bed-ridden HF, 81% stated they would definitely or probably want an LVAD; 50% would consider LVAD to prolong survival if HF survival were predicted to be < 1 year and 75% if < 6 months. Meanwhile, 44% would consider LVAD if they could only walk < 1 block and 64% if they could not dress without stopping. Anticipated thresholds did not differ by NYHA class, time trade-off, or functional score. CONCLUSIONS: Patient thresholds for LVAD insertion parallel objective survival and functional data. HF patients would be receptive to referral for discussion of LVAD by the time expected mortality is within 6 to 12 months and activity remains limited to less than 1 block.
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