M-mode echocardiogram in left ventricular dysfunction

M-mode echocardiogram in left ventricular dysfunction M-mode echocardiogram in left ventricular dysfunction M-mode echocardiogram is commonly used to measure left ventricular dimensions and ejection fraction. Ejection fraction is indicative of the left ventricular systolic function. In this case left ventricular systolic function is grossly depressed, with a left ventricular ejection fraction (EF) of only 31.1%. Usually the left ventricular cavity is also significantly dilated when there is severe left ventricular dysfunction. But here it is within the normal range. IVSd: Interventricular septal septum, diastolic; LVIDd: Left ventricular internal diameter, diastolic; LVPWd: Left ventricular posterior wall, diastolic; IVSs: Interventricular septum, systolic; LVIDs: Left ventricular internal diameter, systolic; EDV: End diastolic volume; IVS/LVPW: Septal to posterior wall ratio (elevated in hypertrophic cardiomyopathy with asymmetric septal hypertrophy); ESV: End systolic volume; FS: Fractional shortening. Here the sweep speed is 75 mm/s. FS = LVIDd – LVIDs/LVIDd × 100. This will give fractional shortening as a percentage. Limitations of ejection fraction measurement by M-mode It measures ejection fraction in only one plane and does not represent global left ventricular function. The contractions of anterior and posterior walls alone are represented in this measurement. It can give erroneous values if there is regional wall motion abnormality of these two walls. Ejection fra...
Source: Cardiophile MD - Category: Cardiology Authors: Tags: Uncategorized Spherical formula for calculation of ejection fraction Teichholz formula Source Type: blogs