Ambulatory wireless Internet electrocardiography: new concepts & maths

A wireless ambulatory ECG system with an Internet based telemedicine service was developed by the authors. Some new solutions of all the three main aids - remote sensing, decision making, and the patients\´ real time management - of a telemedicine solution were applied. Using more sophisticated math analysis - wavelet for heart rate variability and ventricular late potentials, correlation dimension, data mining with piecewise aggregate approximation (PAA) - the indication of conventional ambulatory (Holter) registrations was expanded. The well-defined indications of Holter monitoring do not permit to extend the applications to a greater population for cardiovascular risk prediction. This "inflexibility" was changed with a rapid, frequent Internet ECG monitoring of our HeartSpy, heart observer systems. The clinical studies were performed in various patients\´ groups to predict the recurrence of paroxysmal atrial fibrillation and the occurrence of malignant ventricular arrhythmias and/or sudden cardiac death. The analysis showed some promising results in the prediction of these two diseases, where the conventional methods have only a poor prognostic value