Clinical features

• apical-carotid delay ^b
• No other clinical features usefully diagnose or exclude arrhythmias.

Why?

A slow-rising carotid pulse and apical-carotid delay help diagnose aortic stenosis

Patient	Target Disorder and Reference Standard	Diagnostic Test	LR+ (95% CI)	Post-test Probability	LR- (95% CI)	Post-test Probability
elderly patient with syncope b (pre-test probability: 5%)	aortic stenosis (imaging studies)	slow rise of carotid pulse	130 (33 to 560)	87%	0.62 (0.51 to 0.75)	3%
		apical-carotid delay	infinity (2.4 to infinity)	100%	0.05 (0.01 to 0.31)	0.3%