Key result
The pulmonary arterial angle method on chest roentgenograms estimated systolic pulmonary artery pressure within 5 mm of catheterization values in 96 of 125 patients.
Why the study?
Does the pulmonary arterial angle method on chest roentgenograms accurately estimate systolic pulmonary artery pressure compared to catheterization in patients with mitral stenosis?
Observational (n=125)
Single-blind
Does the pulmonary arterial angle method on chest roentgenograms accurately estimate systolic pulmonary artery pressure compared to catheterization in patients with mitral stenosis?
The pulmonary arterial angle method on chest roentgenograms provides a non-invasive estimation of systolic pulmonary artery pressure that closely matches catheterization values in the majority of patients.
Answers are grounded in this paper and cite their sources.
May support non-invasive sPAP estimation in mitral stenosis; leaves open prospective validation before clinical adoption.
Chest roentgenograms of 125 patients (115 with pure or predominant mitral stenosis) were studied by the pulmonary arterial angle method to estimate systolic pulmonary artery pressure without prior knowledge of catheterization data. First the angle between the line drawn along the right upper lobe artery and the tangent drawn along the point of junction of superior and lateral borders of the right pulmonary artery was determined. Next the angle between the right middle lobe artery and the descending pulmonary artery is determined. The difference between these angles equals systolic pulmonary artery pressure. Catheter and angle values were identical in 26 patients. There was a 1- to 5-mm difference in 70, a 6- to 10-mm difference in 18, an 11- to 15-mm difference in 8, and a difference greater than 15 mm in 3.
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Rajaram et al. (1979) conducted an observational in Mitral stenosis (n=125). Pulmonary arterial angle method vs. Catheterization was evaluated on Difference between estimated and catheterization systolic pulmonary artery pressure. The pulmonary arterial angle method on chest roentgenograms estimated systolic pulmonary artery pressure within 5 mm of catheterization values in 96 of 125 patients.
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