Investigations

Why?

A normal coronary MR angiogram makes clinically signifiant coronary artery disease less likely

Patient	Target Disorder and Reference Standard	Diagnostic Test	LR+ (95% CI)	Post-test Probability	LR- (95% CI)	Post-test Probability
suspected coronary artery disease a (pre-test probability: 57%)	> 50% stenosis (coronary angiography)	coronary MR angiography	2.1 (1.5 to 3.0)	74%	0.21 (0.099 to 0.43)	22%
suspected coronary artery disease  a (pre-test probability: 16%)	> 50% stenosis involving left main stem or 3-vessel disease  (coronary angiography)	coronary MR angiography	8.0 (4.4 to 15)	66%	0.071 (0.011 to 0.47)	1%

Note

• Mean imaging time was 70 minutes (range 33 to 145).