Diagnostic method utilizing standard lead ECG signals
A new and superior strategy for analyzing electrocardiograms (ECG) is disclosed. The strategy utilizes standard leads obtained from only limb electrodes from a conventional electrocardiography system. The strategy determines new additional leads which are utilized in a new calculation of values which upon appropriate analysis, provide new information as to electrical fluctuations in the heart. Also disclosed are processes for mapping and transposing the values in digital form and optionally upon a three-dimensional heart model. And, related systems and computer-readable media are disclosed for performing these processes.
1. A method of assessing the state of a heart, the method comprising:
placing limb electrodes on a body of a patient for which assessment of the state of the heart is to be made;
selecting two standard leads from the limb electrodes;
measuring electrical voltages in each selected standard lead to define two arrays of base voltages;
selecting a time interval;
calculating additional leads as a function of an angular position from the arrays of base voltages defined and the time interval selected to generate a curve of ellipse of electrical voltages of additional leads in each point of the selected time interval; and
reviewing change over time of the ellipse of electrical voltages of the additional leads over the selected time interval to assess the state of the heart of the patient, the reviewing comprising defining in each moment of time of myocardium depolarization and repolarization an asymmetry of the ellipse of electrical voltages as a difference between a square of an area of the ellipse one side of a spatial axis of maximum excitation and a square of an area of the ellipse on the other side of the spatial axis of maximum excitation.