The way Viagra works, is to make better the flow of blood that circulates around the human body by making grow the level of a protein known as phosphodiesterase 5 that is located in the penis and constricts the arteries in that zone. But, this protein is also located in two other areas of the human body, the lungs and the right ventricle of the heart. Pulmonary hypertension influences the blood run 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 must do to pump the protein around the human body in the blood often leads to weariness, short-wind and in extreme cases can cause death of the patient. Having hypertension is easily controlled, and with the adequate medication patients can increment their life by more or less 20 years. However, if a patient has pulmonary hypertension, their life span is greatly shorter. In the extreme cases, a patient may only have 3 years without the correct medication, and this has a hurtful effect on their life quality. No real testing was done with this medical state, as it was hard to determine. Then, in 2002 a study was executed on several patients who were suffering from this condition. PreviousPreceding tests with other medicine focused on healthy hearts, and did not reach successful results because it was hard to strengthen the right ventricle combining with reducing blood pressure and unnerving the lungs. This study involved giving patients measured doses of Viagra, and lead to surprising outcome. Viagra was seen to be very successful in enhancing the heart function of patients who have a diseased right ventricle, and decreased the hypertension in their lungs. Because Viagra is a completely safe and natural medicine that works with the chemical disbalance in the blood stream, doctors at Glasgow
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