Regional pulmonary blood flow in mitral disease studied by xenon radiospirometry.

Regional Lung Function in Patients with Mitral Stenosis Studied with Xenon-133 during Air and Oxygen Breathing.

In a normal man sitting upright, pulmonary blood flow per unit volume of lung is several times greater in the lower zones of the lungs than in the upper (1, 2). Dollery and West (3) have shown that in patients with mitral stenosis this pattern is often reversed and that the upper zones may have several times the blood flow per unit volume of the lower zones. Two explanations for this finding ha...

Alterations in pulmonary blood flow distribution in heart diseases with pulmonary hypertension studies by radioisotope (131-I-MAA) scanning.

Utilizing the 1311-MAA (macroaggregated albumin labeled with iodine-131) scintillation scanning method, regional pulmonary blood flow distribution was studied in 47 cardiac patients with pulmonary hypertension. Remarkable increase of blood flow in the upper zones of the lung together with decrease in the lower zones was found in the majority of the patients with mitral valve disease, while in t...

Alterations in regional pulmonary blood flow in mitral valve disease studied by radioisotope scanning. A simple nontraumatic technique for estimation of left atrial pressure.

Evaluation of diastolic blood flow dynamic of the left ventricle in dogs with mitral valve regurgitation using vector flow mapping

Mitral valve regurgitation (MVR) is a common valvular disease in dogs. Hydrokinetic evaluation of the blood flow within the ventricles has become possible by vector flow mapping (VFM), which shows the blood flow within the ventricles in vector and vortex flows. Blood flow within the left ventricle of MVR dogs was compared at different stages of MVR and to that of normal dogs. 14 normal dogs and...

Alterations in regional pulmonary blood flow in patients with congenital heart disease studied by radioisotope scanning.

External scintillation scanning of intravenously administered '31I-labeled macroaggregates of human serum albumin (1311-MAA) was employed to evaluate the distribution of pulmonary arterial blood flow in 61 normal subjects and in 100 patients with various congenital cardiovascular malformations. Intra-aortic administration of 131I-MAA demonstrated that blood flow through subelavian-pulmonary art...