Assessment of indicator-dilution method of measuring valvular insufficiency

Use of indicator dilution techniques in measuring combined aortic and mitral insufficiency.

• When aortic and mitral valvular insufficiency are present in the same patient, indicator injected into the aortic root regurgitates into the left ventricle and thence into the left atrium. The purpose of this paper is to describe the indicator distribution in such patients and to compare the relationships found with those predicted from a theoretical model of bivalvular insufficiency. Indicat...

Quantitation of valvular regurgitation from multiple indicator-dilution curves.

normal subjects and iii patients with ilomiregurgitanit heart disease yielded a similar contour. This suggested that in the albseimce of reour-itation the pallameters of the distal (arterial) curve ca.n be predicted fromm the proximlmai ( pulm1nomary artery) culve. The distortion of the arterial curve byregurgitationi can timerefore l)e comnpared withi time undistorted )ulmmonmary lartery curve...

assessment of the efficiency of s.p.g.c refineries using network dea

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

The use of invasive techniques, angiography and indicator dilution, for quantification of valvular regurgitations.

Angiographic techniques have been used for the quantification of mitral or aortic and rarely tricuspid regurgitation. Mitral or aortic regurgitant volume per beat and the regurgitation fraction (fao and fm, respectively) are obtained from the angiographic determination of total left ventricular stroke volume (TSV) and forward stroke volume (FSV) estimated by a different technique. Although this...

Relative effects of heart chambers, lungs, and mitral insufficiency on the shape of indicator dilution curves.