Rentrop and Cohen’s Collateral Classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]


Overview

Angiographic assessment of apparent collaterals is useful to quantify the angiogenic response to interventions designed to enhance myocardial perfusion and function in ischemic myocardium. [1] [2] [3]

  • Grade 0: No collateral's present.
  • Grade 1: Barely detectable coronary flow. Contrast medium passes through collateral channels but fails to opacify the epicardial vessels at any time.
  • Grade 2: Partial collateral flow. Contrast material enters but fails to opacify the target epicardial vessel completely.
  • Grade 3: Complete perfusion. Contrast material enters and completely opacifies the target epicardial vessel.

References

  1. Fuchs S. Lack of correlation between angiographic grading of collateral and myocardial perfusion and function. Coron Ar Disease 2001; 12: 173-78.
  2. Abbott JD, Choi EJ, Selzer F, Srinivas VS, Williams DO Impact of Coronary Collaterals on Outcome Following PCI [from the NHLBI Dynamic Registry]. Am J Cardiol. 2005; 96: 676–680.
  3. Koerselman J, van der Graaf Y, de Jaegere PP, Grobbee DE. Coronary Collaterals an Important and Underexposed Aspect of Coronary Artery Disease. Circulation. 2003; 107: 2507-2511.



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