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[Regulation of blood circulation in the extremities in intermittent claudication]
Insights
Peripheral circulation is impaired in patients with intermittent claudication, showing reduced limb blood flow and oxygen consumption even at rest. This indicates pathological changes in circulation regulation, worsening with severity.
Area of Science:
- Vascular Medicine
- Physiology
Context:
- Intermittent claudication (IC) is a common manifestation of peripheral artery disease (PAD).
- Understanding limb circulation in IC is crucial for diagnosis and management.
Purpose:
- To investigate the characteristics of limb circulation in patients with intermittent claudication.
- To compare circulation parameters between IC patients, healthy controls, and those with rest pain.
Summary:
- Limb blood flow is diminished in IC patients, particularly in severe cases.
- Elevated limb vascular resistance and decreased limb tissue oxygen consumption characterize IC.
- Pathological changes in limb circulation regulation and reduced peripheral reserves are evident in IC.
Impact:
- Provides insights into the pathophysiology of IC.
- Highlights the circulatory deficits present even at rest in IC patients.
- Suggests impaired circulatory regulation contributes to functional limitations in IC.
Unlabelled:
The study was aimed to investigate the characteristics of the limb circulation in patients suffering from intermittent claudication. The study group consisted of 71 patients with intermittent claudication. As control served the data of 60 patients with intact peripheral circulation and 24 patients suffering from rest pain, too. The limb blood flow was measured by the venous isotope dye-dilution method.
Results:
1. The limb blood flow will be diminished in intermittent claudication already in resting state. The decrease of the limb blood flow is more expressed in severe claudication (with short claudication distance). 2. The pathological condition of the limb circulation in intermittent claudication can be characterized by the elevation of the limb vascular resistance. 3. The O2 consumption of the limb tissues will decrease in intermittent claudication. The data of the study are indicating that the regulation of the limb circulation will pathologically be changed in claudication. The reserves of the peripheral circulation are diminished and the insufficiency of the limb circulation will be manifested on walking.