Introduction the reason of the use of complementary methods for inquiry of patients in medicine is to confirm the diagnosis of an illness, after to have been established a hypothesis based on clinical history and physical examination. These same complementary examinations, can assist the doctor in the choice of the best therapeutical one when the information are trustworthy and its results establish a direct relation of cause-effect in the illness in question. In other words, the indicative clinical signals of the presence of an illness are specific or at least more common for that illness and, when they are abolished by the implemented treatment, they indicate that the illness was cured or that its clinical repercussions had been brightened up. The complementary methods evidence the presence of occult, proper signals of the illness and that they are identified through inquiry methods special. Professor Roy Taylor takes a slightly different approach. In a similar way, the related clinical signals to an illness can be useful to evaluate its repercussion on the patient. These information, allied to the results of the complementary examinations, allow that if it establishes a prognostic. For example, after infarto of the myocardium, the state of the ventricular function can determine the signals and clinical symptoms of the patient. Moreover, the more compromised it will be the function most intense and complex they must be the mechanisms of hemodinmica compensation, data for example, for the influences of the independent nervous system or angiotensina renina system. Hear other arguments on the topic with Newcastle University.

In the first case, the taquicardia observed to the physical examination, 24-hour eletrocardiograma or Holter, indicate rise of the plasmticos levels of the catecolaminas, for example. The presence of complex arrhythmias in this population indicates great comprometimento of the function, presence or not of residual isquemia, influences of catecolaminas, etc. The inquiry methods must be capable to identify these fisiopatolgicas alterations and to assist the physician in reasoning and, from this, to trace the best therapeutical strategy. .