alexa Intrapulmonary vascular dilatations (IPVD) in liver transplant candidates. Screening by two-dimensional contrast-enhanced echocardiography.
Pulmonology

Pulmonology

Journal of Pulmonary & Respiratory Medicine

Author(s): Krowka MJ, Tajik AJ, Dickson ER, Wiesner RH, Cortese DA

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Abstract Intrapulmonary vascular dilatations (IPVD) are extrahepatic complications of acute and chronic liver disorders that can result in severe hypoxemia. Contrast-enhanced (CE) echocardiography provides a noninvasive method to detect right-to-left shunting associated with IPVD. We prospectively studied 40 consecutive liver transplant candidates to determine the relationship between CE echocardiography, arterial blood gases, and standard pulmonary function tests. Two patients had technically unacceptable results of echocardiographic studies. Thirty-eight patients had acceptable results of studies; seven (18.4 percent) of 38 were hypoxemic (PaO2 less than 70 mm Hg). Thirty-one patients (81.6 percent) had PaO2 greater than or equal to 70 mm Hg. Positive CE echocardiograms suggesting IPVD were found in five (13.2 percent) of 38. Three (9.7 percent) of the 31 patients with PaO2 greater than or equal to 70 mm Hg had positive CE echocardiograms. Two (28.6 percent) of the seven hypoxemic patients had positive CE echocardiography. Mean PaO2 and pulmonary function parameters were not significantly different between those with positive CE echocardiogram compared with those with normal CE echocardiograms. We conclude that for our group of liver transplant candidates, (1) IPVD as suggested by CE echocardiography were not uncommon (13.2 percent), and (2) positive CE echocardiography could be documented in patients who were not hypoxemic (9.7 percent).
This article was published in Chest and referenced in Journal of Pulmonary & Respiratory Medicine

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