Programmable tachycardia pacer
First Claim
1. Programmable apparatus adapted for implantation in a patient, and providing the dual functions of cardiac pacing and delivery of tachycardia breakup pulses upon occurrence of tachycardia in said patient, comprising:
- a. pacing means for providing pacing timing signals in the absence of natural patient heartbeats, said pacing means including a clock generator which generates clock pulses independently of patient heartbeat signals;
b. means for detecting the condition of tachycardia in said patient;
c. tachycardia means for generating tachycardia timing signals in response to said detected tachycardia, said tachycardia means being connected to said pacing means and generating said tachycardia timing signals from said clock pulses;
d. programmable control means for controlling at least one variable of said tachycardia timing signals and for generating output control signals; and
e. common programmable output means connected to receive said pacing timing signals and said tachycardia timing signals, and connected to be controlled by said output control signals, for generating and delivering to said patient output pulses in response to each of such timing pulses.
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Accused Products
Abstract
A programmable implantable pacer is provided for performing the dual functions of demand pacing as well as standby tachycardia breakup. A command parameter control is used for programmably controlling parameters of the pacer operation as well as of the tachycardia recognition and response to same. Upon recognition of tachycardia, a series of stimulus pulses of predetermined rate and number are delivered, the tachycardia breakup pulses being generated and delivered through an output circuit utilized commonly with the demand pacer circuitry.
93 Citations
10 Claims
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1. Programmable apparatus adapted for implantation in a patient, and providing the dual functions of cardiac pacing and delivery of tachycardia breakup pulses upon occurrence of tachycardia in said patient, comprising:
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a. pacing means for providing pacing timing signals in the absence of natural patient heartbeats, said pacing means including a clock generator which generates clock pulses independently of patient heartbeat signals; b. means for detecting the condition of tachycardia in said patient; c. tachycardia means for generating tachycardia timing signals in response to said detected tachycardia, said tachycardia means being connected to said pacing means and generating said tachycardia timing signals from said clock pulses; d. programmable control means for controlling at least one variable of said tachycardia timing signals and for generating output control signals; and e. common programmable output means connected to receive said pacing timing signals and said tachycardia timing signals, and connected to be controlled by said output control signals, for generating and delivering to said patient output pulses in response to each of such timing pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Programmable apparatus adapted for implantation in a patient, and providing the dual functions of cardiac pacing and delivery of tachycardia breakup pulses upon occurrence of tachycardia in said patient, comprising:
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a. pacing means for providing pacing timing signals in the absence of natural patient heartbeats, said pacing means including a clock generator which generates clock pulses independently of patient heartbeat signals; b. recognition means for sensing patient QRS signals and detecting tachycardia in said patient, said recognition means providing a recognition signal which is initiated concurrently with the occurrence of a patient QRS signal; c. tachycardia means enabled by said recognition signal for generating tachycardia timing signals in response to said detected tachycardia, said tachycardia means being connected to said pacing means and generating said tachycardia timing signals from said clock pulses; d. programmable control means for controlling at least one variable of said tachycardia timing signals and for generating output control signals; and e. common programmable output means connected to receive said pacing timing signals and said tachycardia timing signals, and connected to be controlled by said output control signals, for generating and delivering to said patient output pulses in response to each of such timing pulses. - View Dependent Claims (10)
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Specification