An increase in either of these physiological components (cardiac output or TPR) causes a rise in the mean arterial pressure. Vasodilation works to decrease TPR and blood pressure through relaxation of smooth muscle cells in the tunica media layer of large arteries and smaller arterioles.
Contractors' prices for 2-4 hours with heavy equipment removing a small area of concrete (such as a 8x10-foot patio 4-8 inches thick) start around $250-$550 and go up. Removing an average driveway is $1,000-$2,500 and up, particularly if it's reinforced concrete. Prices vary considerably by region.
1 Also, if the driveway was completed with reinforced concrete, then it's more difficult to remove and the cost to remove may go up. 2  Removal of a concrete foundation for a basement may cost between $2000 and $5000, depending on your region, the size of the basement, and concrete disposal fees. A modest patio or sidewalk (i.e. 200 sq. ft.) may be removed by a contractor with heavy equipment in some parts of the country for $400 - $600, though the cost can be significantly more if the concrete cannot be recycled.