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      Características clínicas y laboratoriales de pacientes hospitalizados con hipertensión portal y complicaciones vasculares pulmonares en el Instituto Nacional de Salud del Niño Translated title: Clinical and laboratory characteristics of patients with pulmonary hypertension and pulmonary vascular complications hospitalized at the Instituto Nacional de Salud del Niño

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          Abstract

          El síndrome hepatopulmonar (SHP) y la hipertensión portopulmonar (HTPP) son distintas complicaciones vasculares pulmonares de la hipertensión portal (HTP) y se asocian con una mayor morbilidad y mortalidad. Objetivos: Describir las Características Clínicas y Laboratoriales de los pacientes con HTP y complicaciones vasculares pulmonares hospitalizados en el Instituto Nacional de Salud del Niño. Materiales y métodos: se incluyeron los pacientes con HTP hospitalizados desde enero del 2012 hasta junio del 2013 y que durante su evolución cursaron con SHP o HTPP. Para el análisis se les dividió en un primer grupo de pacientes con cirrosis hepática y un segundo grupo con obstrucción extra hepática de vena porta. Resultados: De 22 pacientes con HTP el 45,5% fueron varones y el rango de edad fue entre 1 mes y 17 años. La etiología en el grupo de cirrosis (n=14) fue: hepatitis autoinmune (35,7%), cirrosis criptogénica (35,7%), error innato del metabolismo (14,3%), hepatitis viral crónica por virus C (7,15%) y atresia de vías biliares extra hepática (7,15%). Las complicaciones vasculares pulmonares, se presentaron más frecuentemente en los pacientes con cirrosis hepática (1 caso de síndrome hepatopulmonar y un caso de hipertensión portopulmonar). En ellos se encontró más frecuentemente disnea, astenia, edema, desnutrición, ascitis, hiperesplenismo y hemorragia digestiva por várices esofágicas, además de valores elevados de ALT, fosfatasa alcalina y menores niveles de albúmina sérica. Conclusiones: En niños con HTP, las complicaciones vasculares pulmonares son muy infrecuentes. En la evaluación de estos pacientes debería incluirse la oximetría de pulso para detectar hipoxemia y posteriormente, de ser necesario una ecocardiografía Doppler y de contraste. Ante el hallazgo de hipertensión sistólica pulmonar es necesario realizar un cateterismo cardiaco derecho.

          Translated abstract

          The hepatopulmonary syndrome (HPS) and portopulmonary hypertension (PPHN) are distinct pulmonary vascular complications of portal hypertension (PHT) and are associated with increased morbidity and mortality. Objectives: To describe the clinical and laboratory characteristics of patients with pulmonary hypertension and pulmonary vascular complications hospitalized at the Instituto Nacional de Salud del Niño. Materials and methods: We included patients with HTP hospitalized from January 2012 to June 2013 and that during its evolution progressed with SHP or HTPP. For analysis, they were divided into a first group of patients with liver cirrhosis and a second group with extrahepatic portal vein obstruction. Results: Of 22 patients with HPT 45.5% were male and the age range was between 1 month and 17 years. The etiology in the group of cirrhosis (n=14) was: autoimmune hepatitis (35.7%), cryptogenic cirrhosis (35.7%), inborn error of metabolism (14.3%), chronic viral hepatitis C (7.15%) virus and atresia extra-hepatic bile ducts (7.15%). Pulmonary vascular complications more frequently occurred in patients with liver cirrhosis (1 case of HPS and a case of PPHTN). They most often dyspnea, asthenia, edema, malnutrition, ascites, hypersplenism and gastrointestinal bleeding from esophageal varices was found. Also, they had elevated ALT values, alkaline phosphatase and serum albumin values decreased. Conclusions: In children with pulmonary hypertension, pulmonary vascular complications are rare. In the evaluation of these patients pulse oximetry should be included to detect hypoxemia and subsequently a Doppler echocardiography and contrast echocardiography necessary. Dueto the finding of systolic pulmonary hypertension it is necessary to perform right heart catheterization.

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          Portopulmonary hypertension and hepatopulmonary syndrome.

          The clinically and pathophysiologically distinct entities of portopulmonary hypertension and hepatopulmonary syndrome occur in a substantial proportion of patients who have advanced liver disease of different causes. These disorders are notoriously underdiagnosed, but they have a substantial impact on survival and require focused treatment. Abnormal intrapulmonary vascular dilatation, the hallmark of hepatopulmonary syndrome, can cause profound hypoxaemia that can be very difficult to treat. By contrast, portopulmonary hypertension results from excessive pulmonary vasoconstriction and vascular remodelling that eventually leads to right-heart failure. Insights into the pathogeneses of these syndromes have led to novel therapeutic approaches. However, in severely affected patients, effective treatment remains a difficult task. In selected patients, liver transplantation represents the only treatment option, but the decision to do isolated liver transplantation is particularly challenging in patients who have severe pulmonary disease involvement. Data from several centres have contributed to provide criteria that allow improved prediction of which patients may, or may not, benefit from liver transplantation alone.
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            Severe pulmonary hypertension in liver transplant candidates.

            Advanced liver disease with portal hypertension may be associated with pulmonary hypertension. A review of 1,205 consecutive liver transplant patients was made to assess the incidence and severity of pulmonary hypertension in patients with end-stage liver disease. Postoperative data were reviewed to determine if outcome was influenced and, in patients with severe pulmonary hypertension, whether pulmonary hypertension was reversed after transplantation. The hemodynamic data of 5 patients who were found to have severe pulmonary hypertension before transplantation and did not receive transplants were also reviewed. The incidence of pulmonary hypertension in the patients who received transplants was 8.5% (n = 102; mean pulmonary artery pressure, > 25 mmHg). The incidence of mild pulmonary hypertension was 6.72% (n = 81; systolic pulmonary artery pressure, 30 to 44 mmHg); that of moderate pulmonary hypertension was 1.16% (n = 14; systolic pulmonary artery pressure, 45 to 59 mmHg); and that of severe pulmonary hypertension was 0.58% (n = 7; systolic pulmonary artery pressure, > 60 mmHg). Mild and moderate pulmonary hypertension did not influence the outcome of the procedure. Severe pulmonary hypertension was associated with mortality rates of 42% at 9 months posttransplantation and 71% at 36 months posttransplantation. Only 2 of 7 patients with severe pulmonary hypertension have survived liver transplantation with a good quality of life. The remaining 5 patients continued to deteriorate with progressive right heart failure with no evidence of amelioration of the pulmonary hypertension. This experience supports the view that in most patients who have severe pulmonary hypertension associated with advanced liver disease, it is caused by fixed pathological changes in the pulmonary vasculature, is not reversible with liver transplantation, and is associated with a very high perioperative mortality rate.
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              Methylene blue improves the hepatopulmonary syndrome.

              The hypoxemia of the hepatopulmonary syndrome, seen in patients with severe chronic liver dysfunction, results from widespread pulmonary vasodilation. No established drug therapy is available for this condition. To study the effect of methylene blue, a potent inhibitor of guanylate cyclase, in patients with severe hepatopulmonary syndrome. Open, uncontrolled trial. Medical intensive care unit at the university hospital in Vienna, Austria. 7 patients with advanced cirrhosis and severe hepatopulmonary syndrome with PaO(2) of 60 mm Hg or less. Insertion of a pulmonary artery catheter and an arterial indwelling catheter; intravenous administration of methylene blue, 3 mg/kg of body weight, over a 15-minute period. Serial measurements of gas exchange and hemodynamic variables. After methylene blue administration, PaO(2) increased in all patients (from a baseline mean +/- SD of 58 +/- 2.5 mm Hg to 74 +/- 11.5 mm Hg 5 hours after infusion; P = 0.006) and the alveolar-arterial difference for partial pressure of oxygen (PAO(2) - PaO(2) ) decreased in all patients, with a maximum effect achieved after 5 hours (from 49 +/- 3.3 mm Hg to 30 +/- 10.4 mm Hg; P = 0.003); even after 10 hours, PAO(2) - PaO(2) was still significantly reduced compared with baseline (P = 0.041). Oxygenation improved because of reduction in shunt fraction (from 41% +/- 3.1% to 25% +/- 4.5%; P < 0.001). Mean pulmonary artery pressure increased (from 20 +/- 5.2 mm Hg to 23 +/- 3.6 mm Hg; P = 0. 028), as did pulmonary vascular resistance (from 58 +/- 23 dyne/sec. cm(-5) to 115 +/- 56 dyne/sec. cm(-5); P = 0.012). Arterial blood pressure did not change significantly. Cardiac output decreased (from 10.6 +/- 2.2 L/min to 8.6 +/- 2.7 L/min; P = 0.008) and systemic vascular resistance increased (from 527 +/- 144 dyne/sec. cm(-5) to 729 +/- 222 dyne/sec. cm(-5); P = 0.037). Heart rate, central venous pressure, and pulmonary capillary wedge pressure remained unchanged. Intravenous methylene blue improved hypoxemia and hyperdynamic circulation in patients with liver cirrhosis and severe hepatopulmonary syndrome.
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                Author and article information

                Journal
                rgp
                Revista de Gastroenterología del Perú
                Rev. gastroenterol. Perú
                Sociedad de Gastroenterología del Perú (Lima, , Peru )
                1022-5129
                January 2017
                : 37
                : 1
                : 9-15
                Affiliations
                [02] Lima orgnameInstituto Nacional de Salud del Niño Perú
                [01] Chiclayo orgnameHospital Regional de Lambayeque Perú
                [03] Arequipa orgnameHospital Carlos Alberto Seguín Escobedo Perú
                Article
                S1022-51292017000100002 S1022-5129(17)03700100002
                84660e79-77e5-4488-9454-78e11169d18e

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 15 September 2015
                : 25 June 2016
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 39, Pages: 7
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                SciELO Peru

                Self URI: Texto completo solamente en formato PDF (ES)
                Categories
                Artículos originales

                Hypertension, pulmonary,Cirrhosis,Liver,Hepatopulmonary syndrome,Cirrosis,Hígado,Hipertensión pulmonar,Síndrome hepatopulmonar

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