A comparison of U.S. and Canadian cardiac catheterization practices in detecting severe coronary artery disease after myocardial infarction: efficiency, yield and long-term implications
Wayne B. Batchelor, MD*,
Eric D. Peterson, MD, MPH*,
Daniel B. Mark, MD, MPH, FACC*,
J. David Knight, MS*,
Christopher B. Granger, MD, FACC*,
Paul W. Armstrong, MD, FACC and
Robert M. Califf, MD, FACC*
* Duke University Clinical Research Institute, Durham, North Carolina, USA
Walter C. Mackenzie Health Sciences Center, Edmonton, Alberta, Canada
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Figure 1 Pie graphs comparing findings at cardiac catheterization in the U.S. and Canada with respect to catheterization frequency and the presence or absence of severe coronary artery disease (CAD). Open = no catheterization; gray = nonsevere CAD; solid = severe CAD.
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Figure 2 Odds ratios and 95% confidence intervals for the likelihood of cardiac catheterization are shown on the right for the U.S. (solid squares) and Canada (open squares). The corresponding odds ratios for the likelihood of severe coronary artery disease (CAD) are displayed on the left. MI = myocardial infarction.
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Figure 3 Bar graph depicting the frequency of cardiac catheterization in the U.S. (solid bars) and Canada (open bars), plotted with the corresponding predicted frequency of severe coronary artery disease (gray bars) according to decade of age.
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