Search results for "veins"

Phytoestrogens increase the capacity of serum to stimulate prostacyclin release in human endothelial cells

2003

Both the estrogen receptor (ER) alpha and beta isoforms are expressed in the endothelium. The ER beta has been assigned a crucial role in normal vascular wall function. Prostacyclin has been ascribed a beneficial effect on vessel wall physiology. Isoflavones bind with higher affinity to ER beta. We investigated the hypothesis that their administration to postmenopausal women can promote endothelial prostacyclin production.Twenty-five healthy postmenopausal women with mild climacteric symptoms received capsules containing 55 mg/day isoflavones derived from soy and red clover for 6 months. Cultured human umbilical vein endothelial cells (HUVECs) were exposed for 24 h to serum collected before…

The “caput medusae” sign in portal hypertension

2018

Glyceraldehyde-3-phosphate dehydrogenase regulates endothelin-1 expression by a novel, redox-sensitive mechanism involving mRNA stability

2008

17 pages.-- PMID: 18809573 [PubMed].-- Printed version published on Dec 2008.

Arginine Vasopressin Enhances Sympathetic Constriction Through the V1 Vasopressin Receptor in Human Saphenous Vein

1998

Background—Arginine vasopressin (AVP) not only acts directly on blood vessels through V1 receptor stimulation but also may modulate adrenergic-mediated responses in animal experiments in vivo and in vitro. The aim of the present study was to investigate whether AVP can contribute to an abnormal adrenergic constrictor response of human saphenous veins. Methods and Results—Saphenous vein rings were obtained from 32 patients undergoing coronary artery bypass surgery. The vein rings were suspended in organ bath chambers for isometric recording of tension. AVP (331029 mol/L) enhanced the contractions elicited by electrical field stimulation at 1, 2, and 4 Hz (by 80%, 70%, and 60%, respectively) …

Superior mesenteric vein thrombosis following open right hemicolectomy and cholecystectomy. Case report

2020

INTRODUZIONE: La SMVT è una seria, rara complicanza della chirurgia addominale. I fattori di rischio sono molteplici, ma scarsamente descritti tanto che i dati sono insufficienti per creare gold standard per la diagnosi e trattamento. La SMVT ha un ampio spettro di presentazioni cliniche, così che spesso la sua diagnosi precoce può essere complessa. CASE REPORT: Una donna obesa di 56 anni con un disordine protrombotico ereditario è stata sottoposta ad emicolectomia destra e colecistectomia open; l’immediato decorso post-operatorio è stato regolare e la paziente è stata dimessa in quinta giornata post-operatoria. In ottava giornata post-operatoria la paziente ha presentato dolore addominale …

Anatomy of nerves of the lower extremities in the context of the treatment for varicose veins

2019

Injury of nerves of the lower extremity is the most prevalent complication associated with invasive treatment of varicose veins. These adverse events are particularly frequent after traditional surgical stripping and thermal ablative procedures. The most frequently injured nerves comprise the saphenous nerve, the sural nerve, and the anterior cutaneous branch of the femoral nerve. The high rate of injury to these nerves is primarily related to their close anatomical relationship with major trunks of the superficial venous system. The great saphenous vein is accompanied by two groups of sensory nerves. In its proximal part it runs along the anterior cutaneous branch of the femoral nerve. In …

Prevalence of extracranial venous abnormalities: results from a sample of 586 multiple sclerosis patients

2011

The aim of this study was to assess the prevalence of chronic cerebrospinal venous insufficiency in an unselected cohort of multiple sclerosis (MS) patients. A total of 586 patients with clinically defined MS underwent catheter venography of the internal jugular veins, brachiocephalic veins and azygos vein. The following findings were regarded as pathologic: no outflow, slowed outflow, reversal of flow direction, prestenotic dilation accompanied by impaired outflow, outflow through collaterals, intraluminal structures obstructing the vein, hypoplasia, agenesia or significant narrowing of the vein. Venous abnormalities were found in 563 patients (96.1%). Lesions in one vein were found in 43.…

Numerical modeling of blood flow in the internal jugular vein with the use of computational fluid mechanics software.

2021

ObjectivesTo determine the site and nature of altered hemodynamics in pathological internal jugular veins.MethodWith the use of computational fluid mechanics software we simulated blood flow in 3 D models of the internal jugular veins that exhibited different morphologies, including nozzle-like strictures in their upper parts and valves in the lower parts.ResultsIn a majority of models with nozzle-like strictures, especially those positioned asymmetrically, abnormal flow pattern was revealed, with significant flow separation and regions with reversed flow. Abnormal valves had no significant impact on flow in a case of already altered flow evoked by stricture in upper part of the vein.Conclu…

Ossovenography and Epidural Venography

1976

Henning (1940) and Ehrhardt and Kneip (1943) were the first to report injection of contrast medium into bone. In 1952 Fischgold et al. reported that contrast injections into a human spinous process resulted in an outline of the venous plexus of the attached vertebral body. In subsequent years improvements have been made which now permit contrast visualization of the venous plexuses of the entire vertebral axis.

Absorption and intestinal catabolism of fatty acids in the rat: effect of chain length and unsaturation

1991

Simultaneous portal blood absorption and intestinal mucosal catabolism of labelled fatty acids were investigated. Anaesthetized adult Wistar rats were infused intraduodenally either with 90 mumol of capric (C10:0), oleic (C18:1), linoleic (C18:2) or arachidonic (C20:4) 1-14C acids or with 30 mumol of each labelled fatty acid in addition to 30 mumol of oleic acid and 30 mumol of monopalmitin. For mixed infusates, experiments were carried out with two additional long-chain fatty acids: palmitic (C16:0) and erucic (C22:1) 1-14C acids. Radioactivity was quantified in the lipids and in the catabolic products in portal blood recovered at 5 min intervals for 1 h after infusion. At the end of the e…