Introduction
Normal values of the electrocardiogram (ECG) are the
basis for establishing and refining diagnostic criteria.
Normal values for the adult ECG have been determined in
a number of studies [1–11]. However, they all carry their
imperfections. Firstly, in the early studies the measurements
had to be done by hand and lead by lead, i.e., without the
timing information offered by simultaneously recorded
leads [1–3]. Today, computer-assisted analysis of digitized
multi-channel ECGs allows more accurate and greatly faster measurement.