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 blood returning to the lungs is usually only down to about 75% oxygen, while the blood leaving your heart has about 100% oxygen. If you stop breathing but your heart keeps pumping blood to your brain, the oxygen content of your blood will decrease over time until you pass out. If your heart stops pumping, there will be no oxygen delivered to the brain and you die very quickly.