Iliac vein compression in an asymptomatic patient population

Abstract

Hemodynamically significant left common iliac vein compression is a frequent anatomic variant in asymptomatic individuals. Therefore compression of the left iliac vein may represent a normal anatomic pattern that has thus far been thought of as a pathologic condition.

CIRSE Standards of Practice Guidelines on Iliocaval Stenting

“…Although these lesions often are occult, they often are the basis of symptoms in patients with postthrombotic disease. Such lesions are present in approximately 60 % of the asymptomatic general population [10,11] but are found in more than 90 % of symptomatic patients [5]. While compression therapy is the basis of therapy in CVD, in many cases, venous recanalization or correction of obstructive iliac vein lesions may result in resolution of symptoms [6].…”

May-thurner syndrome: can it be diagnosed on a single magnetic resonance venography study?

“…Three studies have been published on the degree of compression of the LCIV in asymptomatic patients, with a mean compression of 28%-37.8% (range, -5.6%-74.8%) (16)(17)(18). These findings suggest that iliac vein compression is a common anatomical variant that may not necessarily be associated with chronic leftlower extremity venous congestion or iliofemoral DVT.…”

“…However, in the four cases where MRI was both the index and the comparison study, the mean change in degree of venous compression was 19.6%, with a range from 11.7% increase to 32.6% decrease in degree of compression, which is comparable to our overall results. We used the method described by Kibbe et al (16) to calculate the degree of iliac vein compression. This could potentially overestimate the degree of venous compression if there was prestenotic dilatation of the common iliac vein.…”

“…1). The degree of venous compression was calculated as the diameter of the common iliac vein at the site of maximal compression divided by the diameter of the uncompressed caudal segment of the iliac vein, as previously described and validated by Kibbe et al (16).…”

Ultrassonografia vascular comparada à intravascular no diagnóstico das obstruções venosas ilíacas em portadores de insuficiência venosa crônica

“…2-o ponto mais comum de compressão é próximo à bifurcação da VCI, deixando pouco ou nenhum espaço para a mensuração da veia ilíaca proximal; 3-a veia ilíaca proximal próxima à cava é, muitas vezes, larga, podendo resultar numa sobreestimativa do verdadeiro grau da obstrução ilíaca 9,68 .…”