It means that there is a thickening of the heart muscle, particularly in the wall of the left ventricle.
This is a sign that the heart is having to pump harder to get oxygen rich blood around the body.
It may be related to a number of different conditions, including high blood pressure, heart valve problems and rarely, inherited conditions of the heart muscle.
It poses problems if the thickening is such that it significantly affects the heart's ability to pump oxygenated blood around the body.
Last edited by Vyking; 11-25-2012 at 06:44 PM.