A biological amplifier system is disclosed for displaying the cardiac conduction system activity, particularly the His bundle activity on a beat-to-beat basis by a non-invasive technique. Plural sets of bipolar leads are connected by electrodes to the body surface so as to obtain the same biological...http://www.google.es/patents/US4448202?utm_source=gb-gplus-sharePatente US4448202 - Biological signal amplifier system with noise level reduction
Biological signal amplifier system with noise level reduction
