Longitudinal straightening effect of stents is an additional predictor for major adverse cardiac events
Mariann Gyöngyösi, MD, PhDa,
Paul Yang, MDa,
Aliasghar Khorsand, MSa,
Dietmar Glogar, MD, FESCa on behalf of the Austrian Wiktor Stent Study Group* European Paragon Stent Investigators
a Division of Cardiology, 2nd Department of Internal Medicine, University Medical School of Vienna, Vienna, Austria
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Figure 1 Schematic outline of the radial stretching (left) and longitudinal straightening (right) effect of the stent.
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Figure 2 Different effects of stent implantation on vessel angulation. Upper right and left: coronary artery before and after stent implantation; lower right and left: vessel curve measurements at the level of the stenosis/stent.
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Figure 3 Predictive accuracy (ROC curve) of the prestent vessel angulation for predicting MACE (left). The closer the ROC curve is to the upper left-hand corner of the graph, the more accurate it is, because the true-positive rate is 1 and the false-positive rate is zero. Additional delineation of sensitivity and specificity curves relating to each prestent vessel angulation value and the determination of a cut-off point for the same sensitivity and specificity for predicting MACE (right). MACE = major adverse cardiac events; ROC = receiver operating curve.
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Figure 4 Vessel angulation prestent, poststent and at follow-up in patients with or without MACE. Gray bar = prestent; black bar = poststent; striped bar = follow-up.
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