A brief description of the methodology of analysis of the electric hea
rt field using electrocardiograms, vectorcardiograms, diagrams of pote
ntial maxima/minima and body surface Potential maps is presented. The
text is focused on the description of different kinds of isopotential
and isointegral maps and their diagnostic possibilities. A detailed de
scription of the diagram of potential maxima/minima and its place in d
iagnostic of different disturbances of the heart muscle and conduction
defects is given.