Investigations

• ECG - look for 
  • myocardial infarction ^d
  • left ventricular hypertrophy ^c

Why?

Left ventricular hypertrophy makes an aortic dissection slightly more likely

Patient	Target Disorder and Reference Standard	Diagnostic Test	LR+ (95% CI)	Post-test Probability	LR- (95% CI)	Post-test Probability
suspected aortic dissection undergoing angiography c (pre-test probability: 1%)	aortic dissection (angiography, surgery or autopsy)	hypertension on initial examination (150/90 or more)	2.1 (1.2 to 3.8)	2.1%	0.73 (0.59 to 0.89)	0.73%