[The DeBakey VAD axial flow pump: first clinical experience with a new generation of implantable, nonpulsatile blood pumps for long-term support prior to transplantation].

Abstract:

:Because of the high frequency of acute hemodynamic deterioration in patients awaiting cardiac transplantation, mechanical techniques of circulatory support to bridge the period until transplantation have become a standard clinical procedure. Continuous-flow rotary blood pumps offer exciting new perspectives in terms of ventricular assistance and/or as a total cardiac substitute. A DeBakey VAD axial flow pump was implanted in two male patients (aged 44 and 65 years, respectively) suffering from end-stage left heart failure. In the initial postoperative period the mean flow rate of the pump was 3.9 +/- 0.5 l/min. In both patients, the early postoperative phase was characterised by a completely non-pulsatile flow profile. Two weeks after implantation and partial recovery of the natural left ventricle, increasing pulse pressures became evident and net flow increased to 4.5 +/- 0.6 l/min. Patients were mobilised and made to under-go regular physical training. Hemolysis produced by the pump was low while free haemoglobin stayed in physiological ranges, increasing only slightly from 2.1 +/- 0.8 mg/dl preoperatively to 3.0 +/- 1.5 mg/dl ten weeks after implantation. One patient was successfully transplanted on day 74 after implantation of the DeBakey VAD while the second patient is, after 110 days of pumping, still waiting for transplantation. This first experience concerning clinical implantation of the DeBakey VAD axial flow pump showed that the device is promising as a means of providing mechanical support to bridge the period until cardiac transplantation.

journal_name

Wien Klin Wochenschr

authors

Wieselthaler GM,Schima H,Lassnigg A,Pacher R,Ovsenk T,Laufer G,Noon GP,DeBakey ME,Wolner E

subject

Has Abstract

pub_date

1999-09-03 00:00:00

pages

629-35

issue

16

eissn

0043-5325

issn

1613-7671

journal_volume

111

pub_type

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