This amount of pressure is called one atmosphere of pressure because it is the amount of pressure the earth's atmosphere exerts. Most pressure measurements in scuba diving are given in units of atmospheres or ATA. â¢ Pressure Increases With Depth. The weight of the water above a diver exerts pressure on his body. The deeper a diver descends, the more water he has above him, and the more pressure it exerts on his body. The pressure a diver experiences at a certain depth is the sum of all the pressures above him, both from the water and the air. â¢ every 33 feet of salt water = 1 ATA of pressure.
Cardiomyopathy is diseased heart muscle that cannot function (contract) adequately. Cardiomyopathy results in the failure of the heart muscle to meet the needs of the body for oxygen rich blood and removal of carbon dioxide and other waste products. There are many causes of cardiomyopathy, but the end result is a heart that is weak and cannot maintain a normal ejection fraction or cardiac output. The heart is an electrically-innervated, muscular pump that pushes blood throughout the body through blood vessels.
Causes of Cardiomegaly. Cardiomegaly can be a hereditary problem, or it may develop if you have a condition that affects your heart function. Most of the time, cardiomegaly develops as a result of a medical condition. An enlarged heart usually results from situations that force the heart to pump harder or that cause damage to the heart muscle. At times the heart may become enlarged and weak for no apparent reason.