The way Viagra works, is to improve the stream of blood that runs around the human body by making grow the amount of a protein known as phosphodiesterase 5 that is located in the penis and constricts the arteries in that area. However, 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 blodd stream to the lungs, thus constricting 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 human body in the blood often leads to tiredness, dyspnea and in extreme cases can cause death of the patient. Having hypertension is easily manageable, and with the correct treatment patients can increase their lifespan by approximately 20 years. Nevertheless, if a patient suffers from pulmonary hypertension, their life is greatly decreased. In the most serious of cases, a patient may only have 3 years without the correct medicine, and this has a hurtful effect on their life quality. No real testing was done with this medical condition, as it was difficult to identify. Then, in 2002 experiment was executed on several patients who were suffering from this condition. ForegoingPreceding tests with other drugs focused on healthy hearts, and did not achieve successful results because it was difficult to strengthen the correct ventricle in combination with reducing blood pressure and unnerving the lungs. This study involved giving patients controlled amount of Viagra, and produced amazing outcome. Viagra was seen to be very 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 a completely secure and plain drug that handles the chemical imbalances in the blood run, doctors at Glasgow’s Yorkhill Children’s Hospital prescribed this treatment to infants who were suffering from extreme pulmonary hypertension. The result was surprising. Many of these infants would not have made it without this administration of Viagra, and the treatment has resulted in a breakthrough with improving patient drug. Viagra is also useful in situations such as lung transplant surgery, where the right ventricle can often collapse if the lung is rejected. Viagra is thought to be one of the most popular and successful treatment in conditions such as erectile dysfunction, and now it has been proved to be successful in treating pulmonary hypertension. Expanding the blood vessels and easing the breathing problems of the patient is a modern breakthrough. Because Viagra has no notable side effects, it can now be prescribed to many patients of all ages who experience different blood related deseases.