The quad cab has a smaller back seat and a larger bed, the crew cab has a larger back seat and a smaller bed. To compare them you can go to http://www.ramtrucks.com/en/2011/ram_150... and select the Build My Own option from the bottom of the page.
Heart muscle thickening (called cardiac hypertrophy) can be a healthy response to exercise and pregnancy; however, it often occurs in people with high blood pressure, diabetes, heart failure and certain genetic conditions.
1 Dilated cardiomyopathy is a condition in which the heart becomes weak and the chambers get large. 2  As a result, the heart cannot pump enough blood out to the body. 3  Many different medical problems cause this type of cardiomyopathy. 4  Hypertrophic cardiomyopathy (HCM) is a condition in which the heart muscle becomes thick.