On 2015 Apr 22, Thomas Heston commented:

Compared with the functional testing group, those undergoing an initial CT angiogram were 50% more likely to undergo catheterization (12.2% vs 8.1%) and almost twice as likely to undergo revascularization (6.2% vs 3.2%). These additional procedures, however, did not show any clinical benefit during a median follow-up period of 25 months, as measured by the primary outcome measure (3.3% in the CTA group vs 3.0% in the functional testing group). Thus, the obvious conclusion seems to be that CTA results in more radiation, more catheterizations, and more revascularizations --- without any improvement in clinical outcomes. The results from this study suggest that functional testing is the best initial noninvasive test in symptomatic patients with suspected coronary artery disease.

On 2015 Apr 22, Thomas Heston commented:

Compared with the functional testing group, those undergoing an initial CT angiogram were 50% more likely to undergo catheterization (12.2% vs 8.1%) and almost twice as likely to undergo revascularization (6.2% vs 3.2%). These additional procedures, however, did not show any clinical benefit during a median follow-up period of 25 months, as measured by the primary outcome measure (3.3% in the CTA group vs 3.0% in the functional testing group). Thus, the obvious conclusion seems to be that CTA results in more radiation, more catheterizations, and more revascularizations --- without any improvement in clinical outcomes. The results from this study suggest that functional testing is the best initial noninvasive test in symptomatic patients with suspected coronary artery disease.