Intrapulmonary vascular dilatations are common in portopulmonary hypertension and may be associated with decreased survival.

Abstract

Hepatopulmonary syndrome (HPS) and portopulmonary hypertension (POPH) are pulmonary vascular complications of portal hypertension with divergent clinicopathologic features and management. The presence of intrapulmonary vascular dilatations (IPVDs), detected by agitated saline contrast-enhanced transthoracic echocardiography (cTTE), is an essential feature of HPS but is not typically characteristic of POPH. Although IPVDs have been reported rarely in POPH, the prevalence and significance of this finding have not been systematically studied. We conducted a retrospective chart review of 80 consecutive patients diagnosed with POPH from January 1, 2002 to June 30, 2014 with documentation of cTTE findings, pulmonary hemodynamics, oxygenation, and survival. A total of 34 of the 80 patients (42%) underwent cTTE during initial diagnosis of POPH. IPVDs were detected in 20/34 patients (59%); intracardiac shunting was detected in 9/34 patients (26%; 4 also had IPVDs); and 9 patients (26%) had negative cTTE with no evidence of IPVD or intracardiac shunting. Patients with IPVD had decreased survival as compared to those without IPVD (P = 0.003), a trend that persisted after exclusion of liver transplant recipients (P =  0.07). The IPVD group had a trend toward higher Model for End-Stage Liver Disease score with and without incorporating sodium (MELD or MELD-Na; P = 0.05 for both). The right ventricular index of myocardial performance (RIMP) was lower in the IPVD group (median, 0.4 versus 0.6; P = 0.006). Patients with moderate or large IPVDs (n = 6) had worse oxygenation parameters (partial pressure of arterial oxygen, diffusing capacity of the lung for carbon monoxide, and alveolar-arterial oxygen gradient) as compared to the rest of the cohort. Unexpectedly, IPVDs were frequently documented in POPH and associated with decreased survival. To further understand this observation, we recommend screening for IVPD in all patients with POPH.

• Authors: Lynn A Fussner, Vivek N Iyer, Rodrigo Cartin-Ceba, Grace Lin, Kymberly D Watt, Michael J Krowka
• Journal: Liver transplantation : official publication of the American Association for the Study of Liver Diseases and the International Liver Transplantation Society (Liver Transpl) Vol. 21 Issue 11 Pg. 1355-64 (Nov 2015) ISSN: 1527-6473 [Electronic] United States
• PMID: 26077312 (Publication Type: Journal Article)
• Copyright: © 2015 American Association for the Study of Liver Diseases.

Topics

• Dilatation, Pathologic
• Echocardiography (methods)
• Female
• Follow-Up Studies
• Hepatopulmonary Syndrome (diagnostic imaging, etiology, mortality)
• Humans
• Hypertension, Portal (complications, diagnosis)
• Lung (blood supply)
• Male
• Middle Aged
• Minnesota (epidemiology)
• Prognosis
• Pulmonary Artery (diagnostic imaging)
• Pulmonary Circulation
• Pulmonary Veins (diagnostic imaging)
• Retrospective Studies
• Survival Rate (trends)