Cardiac monitoring apparatus

Details Cardiac monitoring apparatus Cardiac monitoring apparatus

A - Human Necessities

61

B

326/13.2

A61B 5/02 (2006.01)

Patent

CA 1133991

ABSTRACT OF THE DISCLOSURE There is disclosed herein a wristwatch size cardiac monitoring appar- atus which is worn on the wrist of one arm. A conductive material housing acts as one electrode when held firmly in contact with the wrist of the arm on which it is worn. A finger of the other limb is placed on a receiving electrode of the casing which acts as the second electrode. Together, these two electrodes provide a Lead I electrocardiac signal to electronics within the housing. The second electrode consists of a metal layer on which is placed a dielectric mater- ial and when the finger is placed on top of the dielectric material, a capacitor is formed and the electric signal on the finger is transferred to the metal lay- er. Additionally, there is described circuitry which is used to operate the rate monitor. This circuitry includes means for detecting a QRS complex and for causing a count in beats per minute to be displayed, manifesting the heartbeat rate. The circuitry includes means for updating the heartbeat rate displayed every two seconds and for automatically turning the system off when no heartbeats are detected for a six second interval.

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