Device and method to slow or stop the heart temporarily
First Claim
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1. A method for controlling the motion of a heart of a patient, the heart having a heart wall and a myocardial conduction system, said method comprising the steps of:
- inserting a catheter into the heart, the catheter having a distal end;
attaching the distal end of the catheter to the heart wall using a fixation structure;
injecting a block producing agent into a site in the myocardial conduction system through the catheter to produce a transient conduction block locally at the site in the myocardial conduction system to stop normal contraction of the heart; and
pacing the heart to induce contraction of the heart.
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Accused Products
Abstract
Implantable cardiac drug delivery systems. The systems are installed endocardially into a chamber in the heart, and are variously capable of delivering anti-arrhythmia agents into the heart wall, and into the epicardial space outside the heart, and into other chambers in the heart through the septa of the heart.
276 Citations
20 Claims
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1. A method for controlling the motion of a heart of a patient, the heart having a heart wall and a myocardial conduction system, said method comprising the steps of:
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inserting a catheter into the heart, the catheter having a distal end;
attaching the distal end of the catheter to the heart wall using a fixation structure;
injecting a block producing agent into a site in the myocardial conduction system through the catheter to produce a transient conduction block locally at the site in the myocardial conduction system to stop normal contraction of the heart; and
pacing the heart to induce contraction of the heart. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for providing controlled asystole or bradycardia of a heart undergoing cardiac surgery, the heart having a heart wall, said system comprising:
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a first catheter for local infusion of block producing agents into a site within the heart wall, the first catheter having a distal end, the distal end capable of being fixed to and penetrating within the heart wall;
a second catheter for electrical pacing of the heart; and
a controlling system that enables the combined control of the delivery of pacing energy and infusion of the block producing agents. - View Dependent Claims (9, 10)
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11. A system for controlling the motion of the heart of a patient upon demand of an operator, said system comprising:
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an infusion system comprising a reservoir for holding a supply of a block producing agent and a catheter in fluid communication with the reservoir, said catheter having a distal tip capable of being attached to the heart and delivering the block producing agent to a depth within the heart;
a pacing system comprising a source of pacing energy and a pacing lead, said pacing lead having a distal tip adapted to contact the heart and deliver pacing signal to the heart;
a ventilator system adapted to provide air to the patient'"'"'s lungs;
a controller for controlling the infusion system, pacing system, and ventilator system, said controller being programmed to inject the block producing agent into the heart upon demand by the operator, said controller also being programmed to operate the pacing system to provide a slowed beating period in which the pacing system paces the heart in the range of 10-30 beats per minute upon injection of the block producing agent. - View Dependent Claims (12, 13, 14)
the controller is further programmed to operate the pacing system to limit the duration of the slowed beating period to a predetermined length.
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13. The system of claim 11 wherein:
the controller is further programmed to operate the ventilator to cease ventilation during the slowed beating period, and to resume ventilation after the slowed beating period.
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14. The method of claim 11, wherein the block producing agent is cooled saline.
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15. A system for controlling the motion of the heart of a patient upon demand of an operator, said system comprising:
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an infusion system comprising a reservoir for holding a block producing agent and a catheter in fluid communication with the reservoir, said catheter having a distal tip capable of being attached to the heart and delivering the block producing agent to a depth within the heart;
a pacing system comprising a source of pacing energy and a pacing lead, said pacing lead having a distal tip adapted to contact the heart and deliver pacing signal to the heart;
a ventilator system adapted to provide air to the patient'"'"'s lungs;
a controller for controlling the infusion system, pacing system, and ventilator system, said controller being programmed to inject the block producing agent into the heart upon demand by the operator to stop the heart from beating, said controller also being programmed to operate the pacing system to pace the heart after a predetermined non-beating period in which the pacing system does not pace the heart. - View Dependent Claims (16, 17)
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18. A method for controlling the motion of a heart of a patient, the heart having a heart wall and a myocardial conduction system, said method comprising the steps of:
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providing a catheter;
injecting cooled saline into the heart wall through the catheter to produce a transient conduction block locally at the site in the myocardial conduction system to stop normal contraction of the heart; and
pacing the heart to cause a contraction of the heart while injecting cooled saline.
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19. A method for controlling the motion of a heart of a patient, the heart having a heart wall and a myocardial conduction system, said method comprising the steps of:
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inserting a catheter into the heart, the catheter having a distal end;
attaching the distal end of the catheter to the heart wall using a fixation structure;
injecting cooled saline into a site within the heart wall through the catheter to produce a transient conduction block locally at the site in the myocardial conduction system to stop normal contraction of the heart; and
pacing the heart to cause a contraction of the heart. - View Dependent Claims (20)
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Specification