Divide mileage by fuel usage to see your car's fuel consumption. This tells you how many miles you drove per gallon of gas. For example, if you drove 335 miles before refueling, and you filled your car up with 12 gallons of gas, your fuel consumption was 27.9 miles per gallon, or mpg (335 miles / 12 gallon = 27.9 mpg).
Failure on the left side is linked to a general weakening of the heart muscle. This is the more common type of heart failure. The weakened heart muscle no longer can keep up with the demands of the body for oxygen-rich blood. Back-up into the lungs occurs. Symptoms of left-side heart failure include: 1  Tiredness (fatigue). 2  Shortness of breath. 3  Asthma-like wheezing.
The amount your left ventricle does pump out per beat is called the ejection fraction. It's X% (the amount pumped out) of the total amount of blood in the ventricle per heart beat. If your heart pumps out 55% or more of the blood in your left ventricle on each beat, you have good heart function. When it falls below 55% on each beat, you're slipping. That means your heart muscle is too weak to force as much blood out on each contraction as it should. Now, if your EF sounds bad, don't despair.