Fundamentals of electrocardiography.

Among modern instrumental methods, electrocardiography is one of the oldest. Almost 60 years of its history illustrate the fruitfulness of the relationship between physiology and clinic in the use and study of the method of electrophysiological study of the heart. The simplicity and availability of modern equipment, together with the exceptional capabilities of the ECG to see intimate, in the words of A.F. Samoilov, processes in the myocardium made this research method necessary in the wide practice of a therapist, pediatrician, and infectious disease specialist. The desire of doctors to master electrocardiography and its further development in the service of the clinic is understandable. At the same time, a purely morphological analysis of the electrical curve of the heart often leads to erroneous interpretation of electrocardiographic abnormalities, both with overestimation and underestimation of their value in each individual case.