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| Number | Title | Issue Date |
| 6052615 | Method and apparatus for sensing and analyzing electrical activity of the human heart using a four electrode arrangement A method of sensing and analyzing electrical activity of the human heart comprises the sensing of voltage signals generated by the heart between four electrodes (E, A, S and I) located at key positions on the surface of a subject's body. The E electrode i... | 04/18/2000 |
| 5788643 | Process for monitoring patients with chronic congestive heart failure In a process for monitoring patients with chronic congestive heart failure, a high frequency current is passed between electrodes applied to two limbs of a patient. The current, voltage and phase angle between the measured current and voltage are measured... | 08/04/1998 |
