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Intermittent claudication--pathophysiological considerations.

P M Vanhoutte, C De Mey, D Wellens

    Acta Cardiologica
    |January 1, 1979
    PubMed
    Summary
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    Intermittent claudication, a symptom of impaired blood flow to exercising muscles, limits skeletal work tolerance. Reduced circulation due to arterial disease can lead to severe symptoms and exhaustion, with limited treatment options discussed.

    Area of Science:

    • Vascular Medicine
    • Exercise Physiology

    Background:

    • Intermittent claudication arises from an imbalance between skeletal muscle metabolic demands and blood supply.
    • Normal exercise involves microvessel compression, anaerobic metabolism, and reactive hyperemia, increasing blood flow post-exercise.
    • Impaired circulation from arterial disease exacerbates this imbalance, lowering exercise tolerance.

    Purpose of the Study:

    • To explain the physiological mechanisms underlying intermittent claudication.
    • To discuss the impact of occlusive arterial disease on skeletal muscle blood flow during exercise.
    • To briefly review pharmacotherapeutic options for managing this condition.

    Main Methods:

    • The study reviews physiological responses to exercise in healthy individuals and patients with arterial disease.

    Related Experiment Videos

  • It discusses the concept of hyperemia and its impairment in occlusive arterial disease.
  • The "steel phenomenon" and its implications are considered.

    • Main Results:

    • Exercise normally increases muscle blood flow, peaking after cessation.
    • Occlusive arterial disease significantly reduces exercise capacity and circulatory reserves.
    • A "steel phenomenon" can occur with severe obstruction and poor collateralization.

    Conclusions:

    • Intermittent claudication is a key symptom of peripheral arterial disease, indicating compromised skeletal muscle perfusion.
    • The ischemic exercise test is crucial for demonstrating circulatory exhaustion.
    • Pharmacological interventions for this condition are limited and briefly addressed.