Purpose: To seek adequate sequence of MR angiography (MRA) on developmental venous anomaly in the brain. Material and Methods: We collected ten cases who demonstrated developmental venous anomaly on MR image. Eight patients among them, both 3D timeof-flight (TOF) with or without Gadolinium-DTPA enhancement and phase contrast(PC) were performed: TOF without enhancement in five, TOFwith enhanceme...

Aims: Extracellular matrix remodeling has been implicated in a number of vascular conditions, including venous hypertension and varicose veins. However, to date no systematic analysis of matrix remodeling in human veins has been performed. Methods and Results: To understand the consequences of venous hypertension, normal and varicose veins were evaluated using proteomics approaches targeting th...

OBJECTIVES To establish the status of the deep veins in patients presenting with recurrent varicose veins and the effect on treatment decisions. DESIGN Retrospective clinical series. MATERIALS AND METHODS Duplex examination of 570 consecutive patients (843 limbs) presenting with recurrent varicose veins (CEAP C2-4). RESULTS Approximately one third of these patients (34.8%:294 limbs) had n...

BACKGROUND Several studies have suggested an association between Chlamydophila pneumoniae (Cp) infection and atherosclerosis. A recent study detected Cp DNA in the saphenous vein of 12% of all patients before bypass grafting and in 38% of failed grafts. We used a system in which human veins were perfused with autologous blood under arterial pressure. MATERIALS AND METHODS Veins were surplus s...

Pulmonary veins have been seen primarily as conduit vessels; however, over the past two decades, a large amount of evidence has accumulated to indicate that pulmonary veins can exhibit substantial vasoactivity. In this review, the role of veins in regulation of the pulmonary circulation, particularly during the perinatal period and under certain pathophysiological conditions, is discussed. In t...

BACKGROUND Radiofrequency ablation of tissues in pulmonary veins can eliminate paroxysmal atrial fibrillation. OBJECTIVE To explore the characteristics of normal pulmonary veins so as to provide more information relevant to radiofrequency ablation. METHODS 20 structurally normal heart specimens were examined grossly. Histological sections were made from 65 pulmonary veins. RESULTS The lon...

G-proteins are membrane-bound signal transduction proteins which couple extracellular receptor signals to various effectors. This study examines the expression and the function of G-proteins (alpha i, alpha s, alpha q, and alpha o) in experimental intimal hyperplasia. Vein bypass grafts were placed in 30 New Zealand White rabbits and were harvested after 28 d. The contralateral jugular veins se...

I would like to comment Abdelrahman and Eassa on their important paper on the assessment of loupe-assist­ ed subinguinal varicocelectomy in infertile men (1). Methodology was complete, including a group of pa­ tients and another of controls, of adequate sample size, defined with valid inclusion and exclusion criteria, and followed-up at 3 and 6 months with measures of seminal count/morphology a...

BACKGROUND Vascular tissues of humans and dogs contain chymase as an angiotensin II-forming enzyme. In this study, we investigated whether chymase-dependent angiotensin II formation plays a crucial role in the development of vascular proliferation in dog grafted veins. METHODS AND RESULTS The right external jugular vein of dogs was grafted to the ipsilateral carotid artery. As a control group...