heart ventricle weight total heart ventricle weight 2013-01-09T15:09:49Z JSmith The combined weight of both ventricles of the heart, that is, their heaviness or the degree to which they are drawn toward the earth by gravity. The ventricles are the lower chambers of the heart that pump blood away from the heart either to the lungs to be oxygenated or, once oxygenated, to the rest of the body.