More precise interpretation of the results of the 4-variable formula.

If you haven ' t heard of the 4-variable formula for differentiating Normal Variant ST Elevation in V2-V4 from Ischemic ST Elevation due to LAD occlusion, then go here:12 Example Cases of Use of 3- and 4-variable formulas to differentiate normal STE from subtle LAD occlusionI have often said that the closer the formula value is to the cutpoint of 18.2, the more accurate. But how wide is the variation?Here I plot the graphs:SpecificitySpecificity is 97% at a cutpoint of  20.7SensitivitySensitivity is 97% at a cutpoint of 17.0Accuracy

Source: Dr. Smith's ECG Blog - June 16, 2019 Category: Cardiology Authors: Steve Smith Source Type: blogs