The examination of the cardiovascular system needs special attention to the history data, on which the whole investigation needs to be oriented. In the etiopathology of this system, the degree of selection, exploitation ad effort that the animal is being subjected to plays one of the main roles, as well as, in a lesser degree, age, as elements of over-solicitation and implicitly as risk-factors, which can favor or create a misbalance in this vital system. A major impact on the cardio vascular system comes from infectious diseases, which can, either primarily or secondarily, lead to cardio circulatory symptoms, sometimes characteristic. Chronic respiratory disease, nutritional and metabolism misbalances, endocrine disease, renal problems, all are favoring or determining cardiac, vascular and sanguine affections. Te examination of the cardio vascular system is performed through: a general functional examination, a physical (morphological) examination, a complex blood and hemato-forming organs examination.