One minute oxygen uptake in peripheral ischemic vascular disease

Area of Science:

• Vascular Surgery
• Exercise Physiology
• Cardiovascular Diagnostics

Background:

• Ischemic vascular disease of the lower extremities significantly impairs mobility and quality of life.
• Objective assessment of exercise capacity is crucial for evaluating disease severity and treatment efficacy.

Purpose of the Study:

• To evaluate the utility of treadmill testing with oxygen uptake measurement (VO2-45-60) as a diagnostic tool for lower extremity ischemic vascular disease.
• To assess the impact of reconstructive surgery on exercise capacity and aerobic metabolism.

Main Methods:

• Six male patients (ages 31-58) with lower extremity ischemic vascular disease underwent treadmill testing at varying power outputs (41, 123, 164 watts).
• Oxygen uptake at 45-60 seconds of exercise (VO2-45-60) was measured as the primary test score.
• Retesting was performed post-reconstructive surgery.

Main Results:

• Five subjects with aortic, iliac, or common femoral disease exhibited depressed VO2-45-60 values.
• One subject with superficial femoral artery narrowing had normal values.
• Four subjects showed normalized VO2-45-60 post-surgery, with an average increase of 430 ml in oxygen uptake during the first minute.

Conclusions:

• Treadmill testing with VO2-45-60 is a sensitive indicator for detecting significant lower extremity ischemic vascular disease.
• Reconstructive surgery effectively improves exercise capacity, suggesting enhanced aerobic metabolism in affected muscles.