Why the study?
Does velocity-encoded MR imaging accurately measure cardiac output and pulmonary vascular resistance compared to right-sided heart catheterization in patients?
Does velocity-encoded MR imaging accurately measure cardiac output and pulmonary vascular resistance compared to right-sided heart catheterization in patients?
Velocity-encoded MR imaging provides accurate noninvasive estimates of pulmonary arterial blood flow and can distinguish patients with high versus normal pulmonary vascular resistance.
Velocity-encoded MR imaging supports noninvasive PVR assessment; leaves open prospective validation before replacing catheterization.
Cardiac output and pulmonary vascular resistance (PVR) were measured in 19 patients by means of catheterization of the right side of the heart. Results were compared with the cardiac output and indexes of pulmonary arterial blood flow estimated with velocity-encoded magnetic resonance (MR) imaging. Correlations were good between estimates with right-sided heart catheterization and those with velocity-encoded MR imaging. By providing accurate pulmonary arterial blood flow measurements, velocity-encoded MR imaging allowed distinction of patients with high PVR from subjects with normal PVR.
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Mousseaux et al. (1999) studied this question.
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