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Exercise-induced human coronary collateral function: quantitative assessment during acute coronary occlusions

Tilmann Pohl1, Kerstin Wustmann, Stephan Zbinden

  • 1Swiss Cardiovascular Center Bern, University Hospital, CH-3010 Bern, Switzerland.

Cardiology
|October 15, 2003
PubMed

Insights

Dynamic handgrip exercise significantly improved collateral flow index in patients with chronic angina undergoing coronary angioplasty. This finding highlights exercise as a potential factor in enhancing coronary collateral function.

Area of Science:

  • Cardiology
  • Physiology

Background:

  • Chronic angina pectoris often involves impaired coronary collateral circulation.
  • Percutaneous transluminal coronary angioplasty (PTCA) is a common intervention for managing chronic angina.

Purpose of the Study:

  • To investigate the effect of dynamic handgrip exercise (DHE) on collateral flow index (CFI) in patients undergoing PTCA.
  • To assess whether DHE influences collateral blood flow during coronary occlusions.

Main Methods:

  • Fifty patients with chronic angina undergoing PTCA were studied.
  • Collateral flow index (CFI) was measured during two 1-minute coronary occlusions, with and without 3-minute DHE.
  • CFI was calculated using coronary occlusive pressure, mean aortic pressure, and central venous pressure.

Main Results:

  • DHE significantly increased CFI compared to the resting state at both the start and end of occlusions.
  • At the start of occlusion, CFI increased from 0.18 (rest) to 0.22 (DHE) (p=0.01).
  • At the end of occlusion, CFI increased from 0.21 (rest) to 0.25 (DHE) (p=0.007).

Conclusions:

  • Dynamic handgrip exercise enhances coronary collateral blood flow in patients with chronic angina undergoing PTCA.
  • DHE may play a beneficial role in improving myocardial perfusion through collateral pathways.
  • These findings suggest potential therapeutic implications of exercise in managing coronary artery disease.

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