LV Mass and LV Mass Index
Left ventricular mass and left ventricular mass indexed to body surface area estimated by LV cavity dimension and wall thickness at end-diastole.
In a Nutshell
Mass: Normal 90 -100 gm/m2
Method
- Evaluation on short axis parallel to the true LV short axis
- LV mass is measured at a single time point within the cardiac cycle (the standard is end-diastole)
- single breath-hold removes respiratory artifact.
- About 10 slices will cover the ventricle,
- Simpson?s method (?stack of disks?)
- calculated from the
- product of the myocardial volume
- difference between the epicardial and endocardial LV volumes by a semi-three dimensional data set
- specific gravity of heart muscle (1.05 g/ml).
- product of the myocardial volume
Normal Values have such a wide range depending on sex age and race – Echo and MR measurement are fairly consistent
Females about 60 g/m2
Males about 70 g/m2
LV mass was significantly higher in males compared to females (mean?±?SD of 53?±?9 g/m2 vs 42?±?7 g/m2). Petersen et al JCMR
Normal values of LV mass indexed to body surface area were found to be 70 (+/- 6-9 g/m2 in men and 61 (+/- 6 -8 g/m2 in women. Mizukoshi, showed echo and MR good correlation
Normal values of LV mass indexed to body surface area were found to be 60 (+/- 9 g/m2 in men and 49 (+/- 7 g/m2 in women). Fuchs EHJ CV Imaging
Reference Ranges & Partition Values for LV Mass Indexed To BSA (g/m2)
Female | Male | |
Reference Range | 43-95 | 49-115 |
Mildly Abnormal | 96-108 | 116-131 |
Moderately Abnormal | 109-121 | 132-148 |
Severely Abnormal | ?122 | ?149 |
Mizukoshi, Left ventricular mass quantitation using single-phase cardiac magnetic resonance imaging. Am J Cardiol. 1992 Jul 15;70(2):259-62.
Mizukoshi, MD, et al CLINICAL INVESTIGATIONS
LEFT VENTRICULAR MASS AND FUNCTION
Normal Values of Left Ventricular Mass Index Assessed
by Transthoracic Three-Dimensional
Echocardiography
https://youtu.be/kfoarygFZvA
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