Abstract
To determine biventricular cardiac function in pneumovirus-induced acute lung injury in spontaneously breathing mice. Experimental animal study. Animal laboratory. C57Bl/6 mice. Mice were inoculated with the rodent pneumovirus, pneumonia virus of mice. Pneumonia virus of mice-infected mice were studied for right and left ventricular function variables by high-field strength (7 Tesla) cardiac MRI at specific time points during the course of disease compared with baseline. One day before and at peak disease severity, pneumonia virus of mice-infected mice showed significant right and left ventricular systolic and diastolic volume changes, with a progressive decrease in stroke volume and ejection fraction. No evidence for viral myocarditis or viral presence in heart tissue was found. These findings show adverse pulmonary-cardiac interaction in pneumovirus-induced acute lung injury, unrelated to direct virus-mediated effects on the heart.
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