Summary
In order to evaluate during cardiac catheterization what constitutes a physiologically significant obstruction to blood flow in the human coronary system, computer based quantitative analysis of coronary angiograms was performed in 31 patients with isolated proximal left anterior descending coronary artery disease. The angiographic severity of the stenosis was compared with the transstenotic pressure gradient measured with the dilatation catheter during angioplasty and the results of exercise thallium scintigraphy. A curvilinear relation was found between the pressure gradient across the stenosis (normalized for the mean aortic pressure) and the residual minimal obstruction area (after subtracting the area of the angioplasty catheter). This relation was best fitted by the equation: normalized mean pressure gradient = a + b·log [obstruction area], r = 0.74. The measurements of the percent area stenosis (cut-off 80%) and of the transstenotic pressure gradient (cut-off 0.30) obtained at rest, correctly predicted the occurrence of thallium perfusion defects induced by exercise in 83% of the patients.
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© 1986 Martinus Nijhoff Publisher, Dordrecht
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Reiber, J.H.C., Serruys, P.W., Slager, C.J. (1986). Quantitative angiography of the left anterior descending coronary artery: correlations with pressure gradient and exercise thallium scintigraphy. In: Quantitative Coronary and Left Ventricular Cineangiography. Developments in Cardiovascular Medicine, vol 51. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4239-4_21
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DOI: https://doi.org/10.1007/978-94-009-4239-4_21
Publisher Name: Springer, Dordrecht
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