Device for terminating tachycardia
First Claim
1. A device for terminating tachycardia comprising input means responsive to heartbeat signals;
- a tachycardia rate detector connected to the input means and effective to give an output while heartbeat signals occur at a rate characteristic of tachycardia;
a gate circuit connected to be controlled by the output from the tachycardia rate detector;
a variable delay pulse circuit connected to receive as input pulses heartbeat signals from the input means and give output pulses each a predetermined delay after a respective input pulse, the output pulses being applied as input to the gate circuit;
an output circuit connected to supply stimulating pulses to the heart, the stimulating pulses being generated in response to gated pulses received from the gate circuit;
a blocking circuit connected to the gate circuit to ensure that output pulses from the gate are inhibited during a pause period following each output pulse; and
a feedback connection to the variable delay pulse circuit for applying thereto feedback signals which alter the said predetermined delay from one output pulse to the next.
0 Assignments
0 Petitions
Accused Products
Abstract
A device for terminating tachycardia has an input part responsive to heartbeat signals. A tachycardia rate detector is connected to the input part and is effective to give an output while heartbeat signals occur at a rate characteristic of tachycardia. A gate circuit is connected to be controlled by the output from the tachycardia rate detector and a variable delay pulse circuit is connected to receive as input pulses heartbeat signals from the input part and give output pulses each a predetermined delay after a respective input pulse, the output pulses being applied as input to the gate circuit. An output circuit connected to supply stimulating pulses to the heart, the stimulating pulses being generated in response to gated pulses received from the gate circuit. A blocking circuit is connected to the gate circuit to ensure that output pulses from the gate are inhibited during a pause period following each output pulse. A feedback connection to the variable delay pulse circuit applies thereto feedback signals which alter the predetermined delay from one output pulse to the next.
-
Citations
12 Claims
-
1. A device for terminating tachycardia comprising input means responsive to heartbeat signals;
- a tachycardia rate detector connected to the input means and effective to give an output while heartbeat signals occur at a rate characteristic of tachycardia;
a gate circuit connected to be controlled by the output from the tachycardia rate detector;
a variable delay pulse circuit connected to receive as input pulses heartbeat signals from the input means and give output pulses each a predetermined delay after a respective input pulse, the output pulses being applied as input to the gate circuit;
an output circuit connected to supply stimulating pulses to the heart, the stimulating pulses being generated in response to gated pulses received from the gate circuit;
a blocking circuit connected to the gate circuit to ensure that output pulses from the gate are inhibited during a pause period following each output pulse; and
a feedback connection to the variable delay pulse circuit for applying thereto feedback signals which alter the said predetermined delay from one output pulse to the next. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a tachycardia rate detector connected to the input means and effective to give an output while heartbeat signals occur at a rate characteristic of tachycardia;
-
12. A device for terminating tachycardia comprising input means responsive to heartbeat signals;
- a tachycardia rate detector connected to the input means and effective to give an output while heartbeat signals occur at a rate characteristic of tachycardia;
a pulse generator circuit connected to be controlled by the output from the tachycardia rate detector to give output pulses each a predetermined delay after a corresponding heartbeat signal;
a variable delay circuit connected to control the said predetermined delay;
an output circuit connected to supply stimulating pulses to the heart, the stimulating pulses being generated in response to output pulses received from the pulse generator circuit;
a blocking circuit connected to the pulse generator circuit to ensure that output pulses from the pulse generator circuit are inhibited during a pause period following each stimulating pulse; and
a feedback connection to the variable delay pulse circuit for applying thereto feedback signals which alter the said predetermined delay from one output pulse to the next.
- a tachycardia rate detector connected to the input means and effective to give an output while heartbeat signals occur at a rate characteristic of tachycardia;
Specification