Method and apparatus for cardiac shock therapy
First Claim
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1. An apparatus for delivering cardiac shocks, comprising:
- pulse output circuitry for producing voltage pulses between positive and negative terminals;
at least three electrode lead terminals with each such electrode lead terminal switchably connected to the positive and negative terminals;
control circuitry for switching two selected electrode lead terminals to either the positive or negative terminal to impose a voltage produced by the pulse output circuitry between the two selected electrode lead terminals; and
, wherein the control circuitry is configured to deliver a shock pulse by serially switching a plurality of selected pairs of electrode lead terminals to selected ones of the positive and negative terminals to thereby deliver a multiphasic shock pulse which varies both temporally and spatially.
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Abstract
An apparatus and method for delivering defibrillation shock therapy employing a multi-terminal pulse output circuit. In such a circuit, at least three electrode lead terminals are switchably connected to the positive and negative terminals of an energy storage capacitor. By serially switching selected electrode lead terminals to the capacitor terminals, a variety of shock pulse waveforms may be generated.
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Citations
20 Claims
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1. An apparatus for delivering cardiac shocks, comprising:
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pulse output circuitry for producing voltage pulses between positive and negative terminals;
at least three electrode lead terminals with each such electrode lead terminal switchably connected to the positive and negative terminals;
control circuitry for switching two selected electrode lead terminals to either the positive or negative terminal to impose a voltage produced by the pulse output circuitry between the two selected electrode lead terminals; and
,wherein the control circuitry is configured to deliver a shock pulse by serially switching a plurality of selected pairs of electrode lead terminals to selected ones of the positive and negative terminals to thereby deliver a multiphasic shock pulse which varies both temporally and spatially. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for delivering cardiac shocks, comprising:
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producing voltage pulses between positive and negative terminals;
switching two selected electrode lead terminals among a group of at least three such electrode lead terminals to either the positive or negative terminal to impose a voltage produced by the pulse output circuitry between the two selected electrode lead terminals; and
,delivering a shock pulse by serially switching a plurality of selected pairs of electrode lead terminals to selected ones of the positive and negative terminals to thereby deliver a multiphasic shock pulse which varies both temporally and spatially. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification