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Global Longitudinal Strain (GLS) Calculator

Global Longitudinal Strain (GLS): Explanation and Clinical Context Global Longitudinal Strain (GLS) by speckle-tracking echocardiography measures the percentage deformation (shortening) of the left ventricular myocardium in the longitudinal direction during systole. GLS is reported as a negative percentage (for example, −20% represents greater shortening than −15%) and is a sensitive measure of longitudinal systolic

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Gubner-Ungerleider Index (ECG LVH) Calculator

Gubner–Ungerleider Index — explanation and clinical context The Gubner–Ungerleider voltage index is an early electrocardiographic voltage criterion intended to detect left ventricular hypertrophy (LVH). It is calculated as the algebraic sum of the amplitude of the R wave in lead I plus the amplitude of the S wave in lead III (R(I) + S(III)). Classic sources and many contemporary reviews report a commonly used thresho