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Hemodynamic deterioration in chronic venous disease.
J F Welkie1, A J Comerota, M L Katz
1Department of Surgery, Temple University Hospital, Philadelphia, PA 19140.
Journal of Vascular Surgery
|November 1, 1992
Summary
Chronic venous disease (CVD) progression shows worsening hemodynamics and calf muscle pump function up to clinical class 2. Advanced stages like brawny edema occur without further hemodynamic decline in venous insufficiency.
Area of Science:
- Vascular Medicine
- Medical Physiology
- Clinical Research
Background:
- Clinical deterioration in chronic venous disease (CVD) is well-documented.
- The underlying progressive hemodynamic changes are less understood.
- A standardized classification for CVD exists.
Purpose of the Study:
- To correlate venous hemodynamics with clinical severity in patients with CVD.
- To investigate hemodynamic changes across different stages of CVD.
- To assess the impact of deep venous obstruction on hemodynamics.
Main Methods:
- Clinical and hemodynamic evaluation of 274 CVD-affected extremities and 56 healthy controls.
- Assessment of functional venous volume, valvular insufficiency, calf muscle pump efficiency, and ambulatory venous pressure.
- Noninvasive estimation of ambulatory venous pressure using residual volume fraction.
Main Results:
- Hemodynamic deterioration (expanded venous volume, impaired valvular function, inefficient calf muscle pump, ambulatory venous hypertension) parallels CVD progression through class 2.
- No further hemodynamic decline observed in limbs with brawny edema or hyperpigmentation.
- Deep venous obstruction is associated with more severe valvular insufficiency, calf muscle pump dysfunction, and ambulatory venous hypertension.
Conclusions:
- Hemodynamic changes in CVD progress in parallel with clinical severity up to class 2.
- Advanced clinical signs (brawny edema, hyperpigmentation) do not correlate with further hemodynamic deterioration.
- Residual volume fraction is a reliable noninvasive estimate of ambulatory venous pressure, particularly in patients without venous obstruction.