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Functional significance of recruitable collaterals during temporary coronary occlusion evaluated by ^99mTc-sestamibi single-photon emission computerized tomography

Niels Peter R.ønnow Sand, MD, PhD^*, Michael Rehling, DMSci^*, Jens Peder Bagger, DMSci, Leif Thuesen, DMSci, Christian Flø, MSci^* and Torsten T. Nielsen, DMSci

^* Department of Nuclear Medicine, Aarhus University Hospital, Skejby Sygehus, Denmark
Department of Cardiology, Aarhus University Hospital, Skejby Sygehus, Denmark

View larger version (20K): [in a new window]   Figure 1 Change of collateral grade during temporary coronary occlusion. The collateral grades pre-dilation and during inflation are given by III: grade 3 collaterals; II: grade 2 collaterals; I: grade 1 collaterals; 0: no collaterals. The number of patients with a certain collateral grade is shown in the boxes.

View larger version (12K): [in a new window]   Figure 2 Scintigraphically estimated defect severity during balloon occlusion in patients with and without recruitable collaterals.

View larger version (15K): [in a new window]   Figure 3 Coronary wedge pressure in relation to scintigraphic defect severity during balloon occlusion.

View larger version (8K): [in a new window]   Figure 4 Time-activity curve for 99mTc-sestamibi in arterial blood after venous bolus injection.