Key result
An improved plain x-ray technique enhanced the accuracy of estimating pulmonary venous and systolic pulmonary arterial pressures up to 85 to 95% in patients with mitral valvular disease.
Why the study?
Does an improved plain x-ray technique accurately estimate pulmonary vascular pressures in patients with mitral valvular disease?
Observational (n=215)
Does an improved plain x-ray technique accurately estimate pulmonary vascular pressures in patients with mitral valvular disease?
An improved plain x-ray technique can estimate pulmonary venous and arterial pressures with 85-95% accuracy in patients with mitral valve disease.
Answers are grounded in this paper and cite their sources.
May support plain x-ray as adjunct for estimating pulmonary pressures in mitral disease; leaves open prospective validation before clinical use.
Our improvement on Turner's technique enabled more accurate plain x-ray estimation of pulmonary venous pressure (PVP) up to 60 mm and of systolic pulmonary arterial pressure (PAP) up to 150 mm in 215 patients catheterized for mitral valvular disease. Our improvement comprises (1) five main pulmonary artery (MPA) grades 0 to IV according to its area and volume; (2) modified pressure values assigned for MPA and kinetic energy of the right ventricle (required to pump blood into the pulmonary arterial bed) according to MPA grades; and (3) nine PVP grades from 0 to 8 with corresponding assigned PVP values. These modifications have enhanced the accuracy of the technique up to 85 to 95%.
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Rajaram et al. (1979) conducted an observational in Mitral valvular disease (n=215). Improved plain x-ray estimation technique was evaluated on Accuracy of plain x-ray estimation of pulmonary venous pressure and systolic pulmonary arterial pressure. An improved plain x-ray technique enhanced the accuracy of estimating pulmonary venous and systolic pulmonary arterial pressures up to 85 to 95% in patients with mitral valvular disease.
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