How to calculate fractional shbrtening, Biology

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Q. How to calculate Fractional Shbrtening?

With the cursor- beam cutting the left ventricle just beyond the tips of mitral valve in an adequate parasternal long axis view, the M-Mode shows the left ventricular We wall and septa1 thickness in systole and diastole. The LV systolic and iastolic dimensions can be measured and following parameters can be calculate

LVED-Left ventricular end diastolic dimensions

LVES-Left ventricular end systolic dimensions

Normal value = 28-44 per cent

This describes the systolic function at base of the heart. In absence of regional wall motion abnormalities, this may reflect rest of the left ventricle. This is usually calculated automatically from online software using M-Mode ventricular dimensions in systolic and diastolic

Ejection Fraction = 2x fraction shortening provided there are no RWMA.

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