Short-term exercise training prevents micro- And macrovascular disease following coronary stenting

Xin Long, Ian N. Bratz, Mouhamad Alloosh, Jason M. Edwards, Michael Sturek

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

The purpose of this study was to determine the eftects or exercise on coronary blood flow and macrovascular atherosclerosis in response to stent deployment. Male Yucatan swine were placed on a control diet (C); on a high-fat/cholesterol diet (hypercholesterolemic; H); or on a high-fat/cholesterol diet and aerobically exercise trained (HX) stalling after 36 wk on the diet. All pigs underwent coronary angiography and intravascular ultrasound (IVUS) guided placement of a bare metal stent in the circumflex coronary artery after 40 wk on diets and 3 wk later pigs underwent repeat angiography and IVUS and coronary blood flow (CBF) measurement. Average peak velocity (APV) was measured under basal conditions and in response to intracoronary application of the endothelium-independent vasodilator adenosine and the endothelium-dependent vasodilator bradykinin. There was a similar∼8-fold increase in total cholesterol in H and HX compared with control. Baseline CBF was increased above control and H in HX (P < 0.05). At all doses adenosine-induced CBF was impaired in H, but preserved in HX. Similarly, bradykinin-induced CBF was impaired in H vs. control, yet was potentiated in HX. Microvessel density was decreased in H and preserved in HX vs. control. Native atheroma in HX was lower relative to H and control, while in-stent stenosis in HX was not different from H. Hyperlipidemia-induced microvascular dysfunction after stent deployment may be a result of reduction in microvessel density. This is the first report that short-term exercise training near the time of stenting prevents stent-induced microvascular dysfunction and attenuates native atheroma independent of changes in plasma cholesterol in this porcine model.

Original languageEnglish (US)
Pages (from-to)1766-1774
Number of pages9
JournalJournal of Applied Physiology
Volume108
Issue number6
DOIs
StatePublished - Jun 2010

Keywords

  • Exercise
  • Hyperlipidemia
  • Microvessel
  • Restenosis
  • Yucatan swine

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)
  • Medicine(all)

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