Tools

Add a finding for this diagnosis

Add prevalence for this diagnosis

Switch to display mode

Switch to sensitivity and specificity

Sort findings by Tag

Sort findings by Differential Diagnosis

Jump To

Good Positive and Negative Likelihood Ratios

Good Negative Likelihood Ratio

Good Positive Likelihood Ratio

Aortic Stenosis: Likelihood Ratios

Introduction: None written.

[Edit Diagnosis] [Merge dx] [Add prevalence]

Tags: Cardiac Problem Valvular Lesion Tag this Diagnosis.

The likelihood ratios of findings for Aortic Stenosis are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %.	Post-Test Probability (Predictive Value): %.	Switch to display mode.
Note that calculating probabilities from more than one** finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)

Good Negative Likelihood Ratio
Finding	Result	+LR	-LR
[ + ] Murmur Decreases with Valsalva	+ 0 -	1.2	0
Study: JAMA. 1997;277(7):564-571. http://jama.ama-assn.org/cgi/reprint/277/7/564
[ + ] Murmur Radiates to Right Carotid	+ 0 -	1.4	0.1
Study: JAMA. 1997;277(7):564-571. http://jama.ama-assn.org/cgi/reprint/277/7/564

Good Positive Likelihood Ratio
Finding	Result	+LR	-LR
[ + ] Pulsus Tardus	+ 0 -	inf	0.6
slow rise of carotid pulse. Other studies in the meta-analysis gave +LR 2.8 -LR 0.18, 6.4 and .73. This study had grade "A" quality. Study: JAMA. 1997;277(7):564-571. http://jama.ama-assn.org/cgi/reprint/277/7/564