What is the accuracy of coronary computed tomography angiography (CCTA) of coronary artery stents?

Updated: Dec 21, 2017
  • Author: Eugene C Lin, MD; Chief Editor: Eugene C Lin, MD  more...
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Answer

Answer

Visualization of the stent lumen by CCTA is variable.

In a meta-analysis, the sensitivity and specificity of 64-slice CCTA for the detection of coronary in-stent restenosis (>50%) were 90% and 91%, respectively, not including nonassessable stents; 89% of stents were assessable. [29]

Stent size and material can affect evaluability by CCTA. Stents under 3 mm are often nonassessable. [30] Magnesium is the most favorable stent material for imaging. [31] Stainless-steel and cobalt stents are also favorable. [32] Other factors that can potentially limit stent evaluability include overlapping positioning, strut thickness, and large patient size.


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