| pubmed-article:523967 | pubmed:abstractText | A simple non-invasive method for recording of activity from the His-Purkinje system (HPS) is described. The electrical activity was derived from bipolar orthogonal surface leads. The signal was strongly amplified, bandpass filtered, delayed and averaged in an analogue averager before presentation. The equipment is mobile. The characteristics of the equipment are described. There was good agreement between invasive and non-invasive recordings. Out of seventeen subjects studied ten had a measurable HPS signal. Muscle tension and deep breathing tended to obscure the non-invasive recordings. The best lead for the measurements was lead X. | lld:pubmed |
