Patients with mild aortic stenosis do not require treatment or restriction of activity. Patients with moderate aortic stenosis (valve area 1.5 to 1.0 square centimeters) are advised to avoid strenuous activities such as weight lifting or sprinting.hen symptoms of chest pain, syncope, or shortness of breath appear, the prognosis for patients with aortic stenosis without valve replacement surgery is poor.
A geothermal heat pump (GHP) is all electric, like your heat strips. Your heat strips make one unit of heat for one unit of electricity. A GHP actually pumps heat out of the Earth. So, for one unit of electricity, it will pump 3 to 5 units of heat into your home.
However, a home geothermal energy pump can cut energy bills by 30 to 40 percent and will pay for itself within 5 to 10 years [source: Consumer Energy Center]. Geothermal energy is considered renewable because the heat is continually replaced. The water that is removed is put right back into the ground after its heat is used. The world uses about 7,000 megawatts of geothermal energy, about 2,700 megawatts of which is produced in the United States (the equivalent of burning 60 million barrels of oil each year) [source: Geothermal Education Office]. Still, we're not using nearly as much geothermal energy as is available. That has to do with the limited geographic availability of geothermal energy, and the difficulty and expense of drilling down far enough to reach that energy.