The way Viagra works, is to make better the flow of blood that circulates around the body by making grow the amount of a protein known as phosphodiesterase 5 that is located in the penis and presses the arteries in that area. But, this protein is also located in two other areas of the body, the lungs and the right ventricle of the heart. Pulmonary hypertension influences the blood flow to the lungs, thus restricting the arteries and stretching the right ventricle of the heart. It is alike in diagnosis to high blood pressure, but the extra exercise the heart is obliged to do to pump the protein around the body in the blood often is the reason of weariness, short-wind and in extreme cases can bring about death of the patient. Having blood hypertension is easily manageable, and with the corresponding treatment patients can increase their lifespan by more or less 20 years. However, if a patient suffers from pulmonary hypertension, their life is greatly decreased. In the extreme cases, a patient might only have 3 years without the adequate medicine, and this has a harmful result on their life quality. No real test was done with this medical condition, as it was difficult to determine. Then, in 2002 experiment was conducted on a number of patients who sufered from this state. ForegoingPreceding tests with other drugs was focused on healthy hearts, and did not achieve successful outcome because it was difficult to strengthen the correct ventricle combining with lessening blood pressure and relaxing the lungs. This experiment involved giving patients strictly controlled amount of Viagra, and produced surprising outcome. Viagra was identified to be extremely successful in enhancing the heart function of patients who have a diseased right ventricle, and reduced the high pressure in their lungs. Because Viagra is absolutely safe and plain treatment that works with the chemical imbalances in the blood flow, doctors at Glasgow
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