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J Am Coll Cardiol, 2007; 49:15-20, doi:10.1016/j.jacc.2006.08.043 (Published online 12 December 2006).
© 2007 by the American College of Cardiology Foundation
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Coronary Collateral Function Long After Drug-Eluting Stent Implantation

Pascal Meier, MD, Rainer Zbinden, MD, Mario Togni, MD, Peter Wenaweser, MD, Stephan Windecker, MD, Bernhard Meier, MD, FACC, FESC and Christian Seiler, MD, FACC, FESC*

Department of Cardiology, University Hospital, Bern, Switzerland.


Figure 1
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  		Figure 1 Collateral Function Determination

Determination of collateral function in a patient with a bare-metal stent (BMS) (left) and a patient with a drug-eluting stent (DES) (right). The intracoronary (i.c.) electrocardiogram (ECG) lead recording (apart from surface lead recordings) is shown in the upper part of the figure. During coronary balloon occlusion, the i.c. ECG leads of both patients show signs of myocardial ischemia, although those in the BMS group are much less pronounced than those in the DES group. Collateral flow index (CFI) is calculated by dividing mean distal coronary occlusive pressure (Poccl, mm Hg; scale 0 to 200 mm Hg) minus central venous pressure (CVP, mm Hg; scale 0 to 50 mm Hg) by mean aortic pressure (Pao, mm Hg; scale 0 to 150 mm Hg) minus CVP.

 

Figure 2
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  		Figure 2 Individual Collateral Flow Index Data

Intergroup difference in individual collateral flow index values (CFI) (x). Red triangles = mean values; error bars = 1 SD.

 




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Copyright © 2007 by the American College of Cardiology Foundation.