Video dilution technique. An accurate measure of blood flow during routine arteriography

The video dilution technique for measuring blood flow consists of electronically and mathematically processing video taped selective arteriograms to measure the flow in selectively catheterized arteries and to express this flow as a fraction of the flow in any reference artery. Flows were measured by video dilution and a electromagnetic flowmeter in ten dogs; the correlations were excellent. Video dilution flows were also measured in 105 patients. The technique is accurate, simple, and adds no risk to routine selective arteriography.