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).
LV MASS EVALUATION
Diagrammatic representation of the LV with typical CMR short axis images obtained.
Myerson,S et al Assessment of Left Ventricular Mass by Cardiovascular Magnetic Resonance
Hypertension Vol. 39, No. 3 2002

BSA Calculator 

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
Chuang, et al Manning CMR Reference Values for Left Ventricular Volumes, Mass and Ejection Fraction Using Computer-Aided Analysis: The Framingham Heart Study  JMRI

 

Mizukoshi, Left ventricular mass quantitation using single-phase cardiac magnetic resonance imaging.  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

See Map of  Left Ventricle