Evaluation of the optimal driving mode during left ventricular assist with pulsatile catheter pump in calves

D. Mihaylov*, G.J. Verkerke, P.K. Blanksma, J. Elstrodt, E.D. de Jong, G. Rakhorst

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)

Abstract

The pulsatile catheter (PUCA) pump, a left ventricular assist device, was tested during acute experiments in calves using asynchronous and ECG- synchronous assist modes. The aim of the study is to compare ECG-synchronous and asynchronous assist and to find the optimal driving mode for the PUCA pump with respect to left ventricular myocardial oxygen consumption (LV MVO2), pump flow, and coronary flow. LV MVO2 decreased significantly during the asynchronous (from 7.77 to 6.46 ml/min/100 g) as well as during the ECG- synchronous mode (from 8.88 to 7.84 ml/min/100 g). The pump flow was highest during the ECG-synchronous assist (2.94 L/min), followed by the asynchronous assist (2.79 L/min). The peak coronary flow depended strongly on pump ejection timing and showed the best flow patterns during the ECG-synchronous assist. We concluded that for PUCA pump support both asynchronous and ECG- synchronous assists significantly reduce LV MVO2 and that the pump flow generated is enough to maintain the systemic circulation. However, we find the ECG-synchronous mode preferable because this mode optimizes coronary flow patterns at the same time.

Original languageEnglish
Pages (from-to)1117-1122
Number of pages6
JournalArtificial organs
Volume23
Issue number12
DOIs
Publication statusPublished - 1 Dec 1999
Externally publishedYes

Keywords

  • Assist mode
  • Calf
  • Catheter pump
  • Left ventricular assist device

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