Cardiac pacemaker
First Claim
1. A cardiac pacemaker constructed for terminating tachyarrhythmias and including an atrial electrode implantable in a patient'"'"'s heart for supplying atrial stimulation pulses thereto and at which a pulse appears in response to each atrial contraction, and a ventricular electrode implantable in the patient'"'"'s heart for supplying ventricular stimulation pulses thereto, and at which a pulse appears in response to each ventricular contraction, said pacemaker further comprising:
- separately switchable means connected to each said to electrode for causing one said electrode to produce a stimulation pulse at a given time after the occurrence of a pulse on the other said electrode;
first time delay means connected to be actuated by signals derived from the heart behavior for supplying a stimulating pulse to said ventricular electrode at a time after the occurrence of a pulse on said atrial electrode, which is shorter than the physiological atrial-ventricular transfer time; and
second time delay means connected to be actuated by signals derived from the heart behavior for supplying a stimulating pulse to said atrial electrode at a time after the occurrence of a pulse on said ventricular electrode which is shorter than a selected physiological period in the operation of the heart.
1 Assignment
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Accused Products
Abstract
A cardiac pacemaker constructed for terminating tachyarrhythmias and including: an atrial electrode implantable in a patient'"'"'s heart for supplying atrial stimulation pulses thereto and at which a pulse appears in response to each atrial contraction; a ventricular electrode implantable in the patient'"'"'s heart for supplying ventricular stimulation pulses thereto, and at which a pulse appears in response to each ventricular contraction; separately switchable control paths connected to each electrode for causing one electrode to produce a stimulation pulse at a given time after the occurrence of a pulse on the other electrode; a first time delay unit connected to be actuated by signals derived from the heart behavior for supplying a stimulating pulse to the ventricular electrode at a time after the occurrence of a pulse on the atrial electrode, which is shorter than the physiological atrial-ventricular transfer time; and a second time delay unit connected to be actuated by signals derived from the heart behavior for supplying a stimulating pulse to the atrial electrode at a time after the occurrence of a pulse on the ventricular electrode which is shorter than a selected physiological period in the operation of the heart.
53 Citations
15 Claims
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1. A cardiac pacemaker constructed for terminating tachyarrhythmias and including an atrial electrode implantable in a patient'"'"'s heart for supplying atrial stimulation pulses thereto and at which a pulse appears in response to each atrial contraction, and a ventricular electrode implantable in the patient'"'"'s heart for supplying ventricular stimulation pulses thereto, and at which a pulse appears in response to each ventricular contraction, said pacemaker further comprising:
- separately switchable means connected to each said to electrode for causing one said electrode to produce a stimulation pulse at a given time after the occurrence of a pulse on the other said electrode;
first time delay means connected to be actuated by signals derived from the heart behavior for supplying a stimulating pulse to said ventricular electrode at a time after the occurrence of a pulse on said atrial electrode, which is shorter than the physiological atrial-ventricular transfer time; and
second time delay means connected to be actuated by signals derived from the heart behavior for supplying a stimulating pulse to said atrial electrode at a time after the occurrence of a pulse on said ventricular electrode which is shorter than a selected physiological period in the operation of the heart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- separately switchable means connected to each said to electrode for causing one said electrode to produce a stimulation pulse at a given time after the occurrence of a pulse on the other said electrode;
Specification