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Recording vectorcardiographic loops with a microdot thermal printer
1ZLEMA, Institute of Medical Engineering, Medical Academy, Sofia, Bulgaria.
Frontiers of Medical and Biological Engineering : the International Journal of the Japan Society of Medical Electronics and Biological Engineering
|January 1, 1990
Abstract:
The principle of recording vectorcardiographic loops with a microdot thermal printer is developed using a very small memory area. It is based on two previous achievements: (i) orthogonal electocardiogram derivation from the conventional 12-lead system and (ii) recoding of biomedical signals with a microdot thermal printer, thus permitting the VCG to be just an extension of the standard ECG. The principle consists of decomposing the loop into horizontal sectors each one representing a non-ambigous function. It is implemented in ECG instruments, using the Gotemba microdot thermal printers TLP 480Z and TLP 880Z produced in Japan.