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Apparatus and method for adjusting heart/pacer relative to changes in venous diameter during exercise to obtain a required cardiac output.
Apparatus and method for adjusting heart/pacer relative to changes in venous diameter during exercise to obtain a required cardiac output.
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机译:用于在运动期间相对于静脉直径的变化来调节心脏/起搏以获得所需心输出量的设备和方法。
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摘要
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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