Development of acute ischemic heart failure in sheep

D Mihaylov*, H Reintke, P Blanksma, ED De Jong, J Elstrodt, G Rakhorst

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    9 Citations (Scopus)

    Abstract

    The goal of the present study was to develop a large animal model of acute ischemic left ventricular heart failure (LVHF) that can be used to assess the influence of the PUCA pump on the heart and circulatory system under realistic conditions. We tested the hypothesis that mild stenosis of the coronary artery in combination with mild ventricular pacing induces an acute heart failure condition, whereas the separate phenomena themselves do not lead to impaired heart function. Mean aortic pressure (AoP), left ventricular end-diastolic pressure (LVEDP), stroke volume (SV) and myocardial systolic shortening (MSS) were compared 30 minutes after a pacemaker (PM) induced tachycardia in anaesthetized sheep (n=3) without and with +/- 50% stenosis of the proximal LCx. All parameters measured restored to basic levels when stenosis was absent When the LCx was partially occluded, mild PM-induced tachycardia resulted in decreased AoP (P=0.045) as well as in decreased SV (P=0.048); the LVEDP remained high (P=0.002). Also the recovery of MSS was impaired when stenosis was present (P=0.002). These values indicate that acute heart failure conditions were present. The technique used proved to be safe and allowed fine-tuning of the demand ischemia by adapting heart frequency to the required heart failure conditions. The model can be used to study the effect of LV mechanical support during acute heart failure conditions.

    Original languageEnglish
    Pages (from-to)325-330
    Number of pages6
    JournalInternational journal of artificial organs
    Volume23
    Issue number5
    Publication statusPublished - May-2000

    Keywords

    • myocardium
    • stress
    • stenosis
    • ischemia
    • animal model
    • VENTRICULAR ASSIST DEVICE
    • HIA-VAD
    • ANIMAL-MODEL
    • CATHETER
    • PUMP

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