A hipertens?o portal representa a complica??o de v?rias doen?as. Entre as afec??es que podem cursar com hipertens?o do sistema porta, destacam-se a cirrose, a forma hep?tica ou hepatoespl?nica da esquistossomose, neoplasias do f?gado, das vias biliares ou do p?ncreas, fen?menos tromboemb?licos da veia porta e mol?stias supra-hep?ticas. Dentre suas consequ?ncias destacam-se varizes de es?fago e a encefalopatia portossist?mica. A press?o no sistema portal, como em qualquer outro sistema vascular, ? o resultado da intera??o entre o fluxo sangu?neo e a resist?ncia vascular que se op?e a esse fluxo. Assim, a press?o portal pode aumentar, se houver aumento do fluxo sangu?neo portal ou aumento da resist?ncia vascular ou ambos. A resist?ncia aumentada do fluxo pode ser pr?-hep?tica, p?s-hep?tica e intra-hep?tica. O diagn?stico ? baseado em crit?rios cl?nicos, frequentemente com conjunto com exames de imagem e endoscopia.Portal hypertension is a complication of various diseases. Among the diseases that may present with hypertension in the portal system, we highlight cirrhosis, hepatic or hepatosplenic form of schistosomiasis, cancer of the liver, biliary tract or pancreatic cancer, thromboembolic events portal vein and hepatic symptoms. Among its consequences stand out esophageal varices and portosystemic encephalopathy. The pressure in the portal system as in any other vascular system, is the result of the interaction between blood flow and vascular resistance that opposes the flow. Thus, portal pressure may increase, if any increase of portal blood flow or increased vascular resistance, or both. The increased flow resistance can be prehepatic, post-hepatic and intrahepatic. The diagnosis was based on clinical criteria, often together with imaging and endoscopy
