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Topic: Portal hypertension

Related Topics

Portal vein

Hypertension

Spontaneous bacterial peritonitis

Intestinal varices

Hepatic encephalopathy

Esophageal varices

Cirrhosis

Pulmonary hypertension

Blood pressure

Liver

Pulmonary circulation

Ovarian cancer

Doppler ultrasound

Echocardiogram

Alcoholic beverage

	Portal hypertension - Wikipedia, the free encyclopedia
		In medicine, portal hypertension is hypertension (high blood pressure) in the portal vein and its branches.
		It is often defined as a portal pressure gradient (the difference in pressure between the portal vein and the hepatic veins) of 12 mm Hg or greater.
		In acute or severe complications of the hypertension, such as bleeding varices, intravenous terlipressin (an antidiuretic hormone analogue) is commenced to decrease the portal pressure.
	en.wikipedia.org /wiki/Portal_hypertension (236 words)

	New York University Interventional Radiology - Portal Hypertension
		Portal hypertension is defined as blood pressure in the portal vein that exceeds 5 to 10 mm Hg.
		The increase in portal vein pressure is caused by a build-up of scar tissue in a damaged liver.
		Portal hypertension is high blood pressure in the portal vein, the blood vessel that connects the intestines and the liver.
	nyuir.vasculardomain.com /images/uploaded/nyuir/ph.cfm (460 words)

	eMedicine - Portal Hypertension : Article by Jesus Carale, MD
		The initial factor in the pathophysiology of portal hypertension is the increase in vascular resistance to the portal blood flow.
		In cirrhosis, the increase occurs at the hepatic microcirculation (sinusoidal portal hypertension).
		Conn HO: Portal hypertension, varices, and transjugular intrahepatic portosystemic shunts.
	www.emedicine.com /med/topic1889.htm (6121 words)

	Portal Hypertension - Children's Hospital Boston
		Portal hypertension is abnormally high blood pressure in the portal vein, the primary vein which brings blood from the intestine to the liver.
		Portal hypertension can prohibit the liver from doing its job by causing the growth of new blood vessels, called collaterals, that connect blood flow from the intestine to the general circulation, bypassing the liver.
		The long-term outlook for a child with portal hypertension depends heavily on the underlying cause of liver disease and the extent of liver damage.
	www.childrenshospital.org /az/Site1469/printerfriendlypageS1469P0.html (792 words)

	Chapter 14 - Section 11: First Principles of Gastroenterology
		Portal hypertension is defined as increased pressure in the portal vein.
		The portal vein is formed by the confluence of the splenic and superior mesenteric veins.
		Almost all other causes of portal hypertension are mediated predominantly by increasing resistance, although evidence indicates that most high-resistance syndromes are also accompanied by increases in portal venous flow.
	gastroresource.com /GITextbook/en/Chapter14/14-11.htm (2095 words)

	Portal Hypertension
		Portal hypertension is the build-up of pressure in the portal vein (the vein connecting the intestines and the liver).
		Intrahepatic portal hypertension contributes to fluid accumulation in the abdominal cavity (ascites) by forcing more fluid across the liver capsule into the abdominal cavity than the body is capable of draining.
		The presence of significant portal hypertension is implied by ascites, collaterals, or encephalopathy that occurs in the presence of known chronic liver disease or peripheral clinical evidence of chronic liver disease (firm liver, enlarged spleen, spider angiomas, clubbing of fingers, palmar erythema).
	home3.inet.tele.dk /omni/portal_hypertension.htm (1053 words)

	Liver cirrhosis
		Portal hypertention is a state in which the pressure within the hepatic portal vein is increased, causing enlargement of the spleen, enlargement of the veins in the oesophagus (gullet) (which may rupture to cause severe bleeding), and accumulation of fluid in the peritoneal cavity (ascites).
		Occurring in advanced cirrhosis, the accumulation of fluid in the abdominal cavity, or ascites, is related to portal hypertension, significant reduction in serum albumin, and renal retention of sodium.
		As said before, portal hypertension is the increased pressure in the portal vein and its tributaries resulting from increased resistance to the blood flow into the liver, and is usually caused by the scarring process of cirrhosis.
	www.hepatitis.org.uk /s-crina/cirrhosis-main-f3.htm (1325 words)

	THE MERCK MANUAL, Sec. 4, Ch. 38, Clinical Features Of Liver Disease
		Increased flow is a rare cause, although it often contributes to portal hypertension in cirrhosis and occasionally is important in massive splenomegaly resulting from hematologic disorders.
		Portal hypertension is often associated with a hyperdynamic circulation, characterized by increased cardiac output, expanded blood volume, and decreased systemic vascular resistance with relative hypotension.
		Usually, however, portal hypertension is inferred by the presence of collateral circulation, splenomegaly, ascites, or portal-systemic encephalopathy in a patient with chronic liver disease.
	www.merck.com /pubs/mmanual/section4/chapter38/38d.htm (1386 words)

	eMedicine - Portal Hypertension : Article by Ali Nawaz Khan, MBBS, FRCP, FRCR (Site not responding. Last check: 2007-10-13)
		Background: Portal hypertension (PH) represents an increase of the hydrostatic pressure within the portal vein or its tributaries and is defined as an increase in the pressure gradient between the portal vein and hepatic veins or inferior vena cava (IVC).
		The differential diagnosis of enlarged hepatic artery includes an occluded or interrupted portal vein, a surgical portosystemic shunt, reversal of flow in the portal vein, parenteral feedings in newborns, hereditary hemorrhagic telangiectasia, cirrhosis or hepatic diseases associated with alcohol, vascular hepatic tumors, and primary hepatic artery dissection.
		In isolation, increased or decreased echogenicity in the lumen of the portal vein is not sufficient to diagnose or exclude PVT.
	www.emedicine.com /radio/topic570.htm (11348 words)

	Portal Hypertension
		Portal hypertension is an increase in the pressure within the portal vein (the vein that carries blood from the digestive organs to the liver).
		Portal hypertension may also be caused by thrombosis, or clotting in the portal vein.
		During the surgery, the vein from the spleen (called the splenic vein) is detached from the portal vein and attached to the left kidney (renal) vein.
	clevelandclinic.org /health/health-info/docs/0200/0252.asp?index=4912 (1619 words)

	Portal Hypertension: Clinical Manifestations of Liver Disease: Merck Manual Home Edition
		Portal hypertension is abnormally high blood pressure in branches of the portal vein, the large vein that brings blood from the intestines to the liver.
		Portal hypertension leads to the development of veins (called collateral vessels) that directly connect the portal blood vessels to the general circulation, thus bypassing the liver.
		An ultrasound scan may be used to examine the blood flow in the portal blood vessels and to detect the presence of fluid in the abdomen.
	www.merck.com /mmhe/sec10/ch135/ch135e.html (691 words)

	Portal Hypertension (PHTN)
		The pressure in any vascular system is directly proportional to the flow and resistance in that system. Thus portal hypertension develops either because of increased blood flow or because of an increase in resistance at some point in the portal vein, liver hepatic veins or the heart.
		Plasma volume expansion has been recognized in portal hypertension for many years. According to the peripheral vasodilatation hypothesis, portal hypertension leads to a relative hypovolaemia induced by the dilation of the systemic and splanchic circulation induced by nitric oxide.
		Encephalopathy: in portal hypertension, the blood bypasses the liver via the collaterals and the toxic metabolites pass directly to the brain to produce the Encephalopathy.
	www.angelfire.com /ky/IBMS/phtn.html (1181 words)

	Mechanisms behind portal hypertension uncovered
		This particular type of hypertension, called portal hypertension, affects the blood flow into the portal vein, which feeds blood to the liver.
		"The end result of portal hypertension is bleeding and development of ascites [fluid in the abdomen]; so if you could treat it early, you could prevent bleeding and/or the formation of ascites," he said.
		Portal hypertension is similar to the widely known essential hypertension, which impairs blood flow to the heart systems.
	www.rxpgnews.com /research/cardiology/hypertension/article_2531.shtml (667 words)

	Liver: Portal Hypertension Surgery
		Portal hypertension is increased blood pressure in the veins of abdominal organs.
		Portal hypertension can be accompanied by good liver function with good production of all necessary proteins.
		During this operation the surgical connection between the portal vein or its branches and the vena cava (low-pressure vein caring blood from lower extremities and kidneys to the heart) or its branches is created.
	www.surgery.usc.edu /divisions/hep/portalhypertensionsurgery.html (294 words)

	Portal Hypertension - Strong Heart and Vascular Center - Rochester, NY
		Portal hypertension, or high blood pressure in the portal vein results from the presence of scar tissue in a damaged liver.
		This causes blood to back up into the portal vein and increases the blood pressure there as the blood finds alternate routes back to the heart and lungs, usually by forcing its way into the tiny veins of the esophagus and stomach.
		Portal hypertension may be suspected if a person with liver disease also has one of the symptoms above.
	www.stronghealth.com /services/surgical/vascular/portalhypertension.cfm (507 words)

	Portal Hypertension
		Portal hypertension is an increase in the blood pressure within a system of veins called the portal venous system.
		Other causes of portal hypertension include blood clots in the portal vein, blockages of the veins that carry the blood from the liver to the heart, and a parasitic infection called schistosomiasis.
		The DSRS is a surgical procedure during which the vein from the spleen (called the splenic vein) is detached from the portal vein and attached to the left kidney (renal) vein.
	www.webmd.com /content/article/90/100603.htm (1619 words)

	Portal Hypertension: Increased Portal Vein Blood Pressure
		The portal vein is a major vein in the portal venous system, which drains blood from the gastrointestinal tract into the liver.
		Portal hypertension is most often caused by cirrhosis or scarring of the liver.
		Blood clots in the liver or the portal vein may cause portal hypertension, though this condition is less common.
	www.liverdisordersfocus.com /liver-disorders/portal-hypertension.php (676 words)

	Portal Hypertension -- eCureMe.com
		Portal hypertension is a condition in which there is an increase in the pressure within the portal vein.
		The portal vein is the main vein that feeds blood into the liver.
		Other causes of his condition include portal vein obstruction (due to a blood clot or tumor), splenic vein obstruction, schistosomiasis (an infection that can go into the liver), noncirrhotic intrahepatic portal sclerosis, or an arterial-portal vein fistula (in which blood from an artery directly goes into the portal vein).
	www.ecureme.com /emyhealth/data/Portal_Hypertension.asp (1159 words)

	ScienceDaily: Researchers Uncover Mechanisms Leading To Portal Hypertension
		Enzyme Affects Hypertension By Controlling Salt Levels In Body (July 7, 2005) -- An enzyme known to cause hypertension increases blood pressure by activating tiny pores, or channels, in kidney cells that allow increased levels of sodium to be reabsorbed into the blood,...
		Hypertension And Atherosclerosis May Have A Common Cause, Researchers Say (November 15, 1999) -- The same hormone that causes high blood pressure may promote the development of atherosclerosis, reported researchers from Wake Forest University Baptist Medical Center at the national meeting of the...
		Hypertension -- Hypertension or high blood pressure is a medical condition wherein the blood pressure is chronically elevated.
	www.sciencedaily.com /releases/2005/09/050930083357.htm (1780 words)

	GE Healthcare - Clinical Case Studies - Sonography - Portal Venous Hypertension
		This causes the blood pressure in the hepatic circulation to increase (portal hypertension).
		The evaluation of the portal venous system, hepatic veins, and hepatic artery is performed during the Doppler imaging examination.
		Portal venous thrombosis or post op anastomosis from a liver transplant can cause an abnormal portal vein signal: results from decreased vessel lumen size which reduces the pressure, and consequently increases the velocity of flow through the narrowed region - "choppy" appearance as result of increased velocities.
	www.gehealthcare.com /usen/ultrasound/products/best_prac_pvh.html (2061 words)

	Liver fibrosis (NCPF) and portal hypertension (Site not responding. Last check: 2007-10-13)
		A new operation for selective decompression of portal hypertension in children with diminutive splenic veins is desired.
		A study of gut ecology was undertaken on 16 patients with non-cirrhotic portal fibrosis(NCPF), 18 patients of cirrhosis and 6 patients of extra hepatic portal obstruction (EHO).
		METHODS: Patients with portal hypertension (PHT) with variceal bleed were prospectively evaluated for PHG and GV before EST with intravariceal injection of absolute alcohol and after esophageal variceal obliteration.
	www.dngmresfoundation.org /htmlfiles/Liverfibrosis.htm (1190 words)

	Portal hypertension induces sodium channel expression in colonocytes from the distal colon of the rat -- Fraser et al. ...
		Portal hypertension induces sodium channel expression in colonocytes from the distal colon of the rat -- Fraser et al.
		Portal hypertension induces sodium channel expression in colonocytes from the distal colon of the rat
		In the present study, we investigated the effect of portal hypertension on Na transport in the rat distal colon.
	ajpgi.physiology.org /cgi/content/full/279/5/G886 (4298 words)

	Portal hypertension: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-13)
		In medicine, hypertension is abnormally high blood pressure....
		The portal vein is a major vein in the human body draining blood from the digestive system and its associated glands....
		Hepatic encephalopathy is a condition (usually caused by liver cirrhosis and its resultant portal hypertension) where toxins from the gut damage cells of the...
	www.absoluteastronomy.com /encyclopedia/p/po/portal_hypertension.htm (740 words)

	ABC of diseases of liver, pancreas, and biliary system: Portal hypertension{---}1: varices -- Krige and Beckingham 322 ...
		The portal vein carries about 1500 ml/min of blood from the small and large bowel, spleen, and stomach to the liver at a pressure
		Most patients with portal hypertension never bleed, and it is difficult to predict who will.
		Bleeding from portal hypertensive gastropathy accounts for 2-3% of bleeding episodes in cirrhosis.
	bmj.bmjjournals.com /cgi/content/full/322/7282/348 (1309 words)

	Hepatitis Neighborhood : Prevention of Portal Hypertension is Doctors' Aim
		Portal hypertension is high blood pressure in the portal vein, which feeds blood to the liver.
		"Portal hypertension is a deadly disease that complicates many forms of chronic liver injury," said Rockey, who was a professor of Gastroenterology and director of the Liver Center at Duke University when he participated in this research.
		Portal hypertension can also be potentially deadly, with an approximate 30% mortality rate, the researchers pointed out.
	www.hepatitisneighborhood.com /content/in_the_news/archive_2564.aspx (748 words)

	Portal Hypertension
		Seen most frequently in patients with liver disease such as cirrhosis or hepatitis, portal hypertension is a condition in which the normal flow of blood through the liver is slowed or blocked by scarring or other damage.
		This is a painless procedure in which a radiologist or technician moves an instrument (transducer/receiver) about the size and shape of a computer mouse across the outside surface of the skin.
		TIPS can often help a condition called portal hypertension, which occurs when the normal flow of blood through the blood vessels in the liver is slowed or blocked by scarring or other damage.
	www.via-med.com /portalhypertension.aspx (1015 words)

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