A Novel Electrocardiograph for Analysis of Ventricular Repolarisation

A new type of electrocardiograph, which analyses the frequency content of the T wave of the ECG in particular, has been introduced. At the time of the study, a limited number of measures of the energy of the various frequencies was available for study and these were grouped into left and right ventricular measures for early and late repolarisation. A study of 75 apparently healthy individuals and 75 randomly selected patients was undertaken. Results showed that the indices of repolarisation were clearly sex dependent, though not age dependent, which was a reflection of the predominance of young individuals in the healthy group. The maximum T wave amplitude from any lead correlated highly with T wave energy. Approximate normal ranges of repolarisation measures were also developed. It was also found that a few patients with a normal ECG had an abnormally low energy pattern based on the output from the new device.