Two patients with acute myocardial infarction were admitted with unremarkable electrocardiograms, which did not reveal the location of the damage. A review of these electrocardiograms led to a suspicion of the presence of Brugada sign (BRSG), something subsequently confirmed by the administration of a sodium channel blocker. The unmasking of BRSG was unexpectedly accompanied by repolarisation a...

The electrical activity of the heart usually shows dynamical behavior which is neither periodic nor deterministically chaotic: The interbeat intervals seem to contain a random component. Although long term predictions are thus impossible, good predictions can be made for times smaller than one heart cycle. This fact is used in order to suppress measurement errors by a local geometric projection...

Brink (1951) first described inversion of the T wave in the prncordial leads in apparently healthy Africans. Littmann (1946) had described similar changes found occasionally in healthy adult American Negroes, in whom Goldman (1953) later described S-T segment elevation in the left prncordial leads. Grusin (1954) showed that many African medical patients with or without heart disease had electro...

The goal of this research is to develop a simple and inexpensive method for rapid digitization of hard copy ECG records, conversion to a "raw" voltage-time format, transmit them over computer networks to a centralized reading location for re-analysis and over-reading. Free Receiver Operator Characteristic methodology was used to prove a null hypothesis that scan converted hard-copy 12-lead ECGs...