Investigations

• exercise echocardiography ^a  

Why?

An abnormal exercise echocardiogram makes coronary artery disease more 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: 64%)	coronary artery disease (coronary angiography)	exercise echocardiography	3.3 (2.9 to 3.6)	85%	0.16 (0.14 to 0.19)	23%

Stress echocardiography can help diagnose restenosis following PTCA but not rule it out

Patient	Target Disorder and Reference Standard	Diagnostic Test	LR+ (95% CI)	Post-test Probability	LR- (95% CI)	Post-test Probability
recent PTCA a   (pre-test probability: 51%)	coronary artery re stenosis > 50% (coronary angiography)	stress echocardiography	4.9	84%	0.43	31%