Quality Vascular Imaging-"Does Distal Venous Hypertension Affect Lower Extremity Venous Pulsatility?"

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"Does Distal Venous Hypertension Affect Lower Extremity Venous Pulsatility?"

D. E. Strandness, MD, Scientific Award for Excellence in Scientific Research

Introduction: Pulsatile flow in the lower extremity venous system is commonly attributed to various cardiac abnormalities. In patients with significant venous insufficiency and resultant venous hypertension, venous capacitance may be drastically reduced. We have noted multiple patterns of venous pulsatility and theorized that the hemodynamic state of the lower extremity venous system could in fact play a role in these patterns. If venous reflux is isolated to the superficial system, ablation of these veins could resolve the venous hypertension and potentially influence the pulsatile flow pattern.
Methods: We compared the presence and pattern of lower extremity venous pulsatility in 293 consecutive patients suffering from chronic venous insufficiency (Mean CEAP 3.2). Of these, 242 limbs underwent endovenous thermal ablation (EVTA) of a refluxing truncal vein. Duplex ultrasound was used to evaluate these limbs approximately 3 days post procedure and provide the basis of this study.
Results: Of the 242 limbs, 98 (40.1%) had evidence of pulsatile flow in the lower extremity venous system preoperatively which was graded into one of three categories. 48 (19.8%) had deep venous insufficiency (16 FV, 32 POP V), which was graded as normal, > 1 second, or > 2 seconds. The remaining had no evidence of deep vein reflux. Paired observations using the Wilcoxon method showed no difference in the venous pulsatility post ablation. Additionally, isolating patients with no evidence of deep venous reflux also revealed no difference in pulsatility following ablation.
Conclusion: Ablation of refluxing truncal veins did not appear to influence the presence or pattern of venous pulsatility in the lower extremities regardless of deep system valve function.

Schroedter WB, White JM, White BD, Sanchez EJ, Izzo EG, June 2010

Source: http://www.svunet.org/i4a/pages/index.cfm?pageid=3303#research

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