'Be happy and keep your heart healthy' is the formula given by a recent study published in the European Heart Journal. Heart's function is to keep the engine of the body running. In that way it keeps us alive and alert. If there is no circulation, there is no consciousness. Without consciousness there is no felling including happiness.
According to the study, this works in reverse direction also. Try to be happy and keep your heart cheerful. In the 10 year study by the Columbia University, the prime finding was that the sufferers of cardiac ailments were not the happy people. Happiest people have not experienced cardiac problems much.
