The way Viagra works, is to better the stream of blood that circulates around the human body by incrementing the amount of a protein known as phosphodiesterase 5 that is located in the phallus and presses the arteries in that area. However, this protein is also found in two other areas of the body, the lungs and the right ventricle of the heart. Pulmonary hypertension affects the blodd stream to the lungs, thus restricting the arteries and straining the right ventricle of the heart. It is similar in diagnosis to high blood pressure, but the additional exercise the heart has to do to pump the protein around the body in the blood often leads to fatigue, short-wind and in extreme cases can result in death of the patient. Having high blood pressure is easily controlled, and with the corresponding treatment patients can increase their life by more or less twenty years. Nevertheless, if a patient suffers from pulmonary hypertension, their life is significantly decreased. In the most serious of cases, a patient may only have 3 years without the adequate medication, and this has a harmful result on their life quality. No essential testing was done with this medical state, as it was hard to diagnose. Then, in 2002 experiment was conducted on a number of patients who sufered from this state. PreviousPreceding tests with other treatment focused on healthy hearts, and did not get successful results because it was hard to strengthen the right ventricle in combination with reducing 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 very successful in enhancing the heart function of patients who have a stressed right ventricle, and decreased the high pressure in their lungs. Because Viagra is a completely secure and plain medication that handles the chemical disbalance in the blood flow, doctors at Glasgow
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