Biological reactions in the heart - What should we do in 'cardiology'?

Humankind is on a similar evolutionary process to animals. Biological react ions in the human heart will be reviewed, and consideration will be made ab out what can be done in cardiology, from the viewpoints of basic, clinical and community medicine. Functional reactions of the heart to acute loading (exercise, etc) comprise myocardial contractility, preload, pump function a nd peripheral factors, and are mobilized step by step in that order, to mai ntain normal functioning. Morphological reactions to chronic loading (hyper tension etc) comprise hypertrophy and dilatation, which are caused by mecha nical and nonmechanical factors, but may not always be mobilized to maintai n normal functioning. Various neurohumoral factors take part in the mechani sms, and modifications, of these reactions. They act in a complex manner ac cording to the biological conditions, and may not always act to maintain no rmal functioning. The biological reactions in the heart (ie, Basic Cardiolo gy) should not be interpreted as having purpose; that is, putting a value o n humankind, although medical treatment (Clinical Cardiology) and the solut ion of health problems in the community (Community Cardiology) should be do ne from this viewpoint.