Portable data logging system for long-term continuous monitoring of biomedical signals

The described portable data-logging system is intended for continuous and long-term monitoring of the heart rate variability (HRV). For this purpose, the system enables the acquisition of the following signals: RR interval calculated from the electrocardiogram (ECG), body and environment temperature as well as the state of the event marker (EM) button. The attained small dimensions (90 /spl times/ 50 /spl times/ 15 mm) and small weight (100 g), together with the leather bag and the fastening belts enable the portable device to be worn comfortably during the measurement time. The user-friendly PC software enables the management of all required pieces of information about subjects and measured signal data.