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  • Title: Follow-up of survivors of mechanical circulatory support.
    Author: Kanter KR, Ruzevich SA, Pennington DG, McBride LR, Swartz MT, Willman VL.
    Journal: J Thorac Cardiovasc Surg; 1988 Jul; 96(1):72-80. PubMed ID: 3386294.
    Abstract:
    Improvements in mechanical support for profound circulatory collapse have resulted in increasing survival of these critically ill patients. Since 1980, 27 patients aged 3 days to 69 years (mean 34.9 years) who required mechanical circulatory assistance have been followed up after discharge from the hospital. The refractory cardiogenic shock necessitating mechanical support occurred postoperatively in 22 patients (coronary artery bypass in nine, valve replacement in four, correction of congenital heart defects in nine) and with end-stage cardiomyopathy in five. Fourteen patients were supported with a Pierce-Donachy ventricular assist device (left ventricular assist in seven, right ventricular assist in three, both in four); nine were supported with extracorporeal membrane oxygenation, two with a Medtronic centrifugal left ventricular assist pump, one with biventricular Biomedicus pumps, and one with a Novacor left ventricular assist system. The duration of support ranged from 8 hours to 91 days with a mean of 3.5 days in patients supported for postoperative shock. Major complications occurred in 18 patients (67%), including bleeding that necessitated operative exploration in 14, serious infection in five, renal failure in two, and stroke in two. The five patients with cardiomyopathy underwent cardiac transplantation. The remaining 22 patients who had postoperative cardiogenic shock were weaned from support. There have been four late deaths: two cardiac related at 6 months and two of cancer at 46 and 53 months (one patient was in New York Heart Association class I and the other in class II before death). The remaining 23 survivors have been followed up for 3 to 79 months (mean 29 months) and at last examination 17 (74%) were in class I, two (9%) were in class II, three (13%) were in class III, and one (4%) was in class IV. Eight patients are employed full time, three are retired, four attend school, three are in preschool, one is a housewife, and one is unemployed but free of symptoms. Only four patients have significant cardiac disability, and one of these still works. In conclusion, mechanical circulatory assistance allows adequate support to permit satisfactory long-term survival in patients with refractory cardiogenic shock.
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