This publication provides the results of a two-stage Delphi process by which a panel of Canadian physicians rated the appropriateness and necessity of indications for the use of coronary angiography. Chapter One, "Methods and Appropriateness Results," summarizes the methods by which the panelists rated the appropriateness of indications for coronary angiography and discusses how those ratings were analyzed. The actual ratings of appropriateness are provided in Appendix A. Chapter Two, "Methods and Necessity Results," summarizes the methods by which the panelists rated the necessity of appropriate indications for coronary angiography and discusses how those ratings were analyzed. The actual ratings of necessity are shown in Appendix B. Chapter Three, "Definitions Used by Panel in Final Ratings of Indications," provides the definitions that were used by the panelists in making their final round of ratings. This publication is part of a three-volume series. Two volumes report ratings for the appropriateness and necessity of performing coronary artery bypass graft surgery, percutaneous transluminal coronary angioplasty and coronary angiography. The other volume provides the medical records abstraction form and guidelines for its use.