Surgery – Truss – Pad
Patent
1986-02-18
1988-09-13
Kamm, William E.
Surgery
Truss
Pad
128670, 128786, A61N 136
Patent
active
047701773
ABSTRACT:
The apparatus paces a heart in accordance with the heart/pacer rate needed to produce a required cardiac output while a person is exercising or undergoes emotional stress in response to changes in venous blood vessel diameter. The apparatus includes a pacer adapted to be implanted in a human body and having a pulse generator and control circuitry, which may be realized by a microprocessor, therein; a pacing lead adapted to be implanted in a heart having a tip electrode adapted to engage and supply pacing pulses to a right ventricle of a heart; a piezoelectric sensor for determining changes in diameter of a vein in the human body; and computing circuitry including the control circuitry, for relating the changes in venous blood vessel diameter with the required pacing rate needed to supply a desired cardiac output and for causing the pacer to pace the heart at the required rate when the heart is not naturally paced.
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Collins Henry W.
Kamm William E.
Telectronics N.V.
Vigil Thomas R.
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