Neha, who in the name of the class functional is also known, is a simple system to diagnose disease in the field of heart failure. The system of the patient, according to the statements of his during a medical interview and or visible signs in terms of the number of breathing, the restrictions in doing physical activity and the patient's complaint of pain, like the pain of angina, the in the four different groups of the classification, Neha puts. For example, a condition in which a class is placed has a specific sign, but a heart problem.