Methods, apparatus, and systems for multiple stimulation from a single stimulator

摘要

Methods, apparatus, and systems are provided to stimulate multiple sites in a heart. A controller senses electrical activity associated with sinus rhythm of the heart. A signal generator is configured to generate an electrical signal for stimulating the heart. Based on the electrical signal, a distributor circuit then distributes the stimulating signals, such as pacing pulses, to a heart. The distributor circuit may vary the delay time between stimulating signals, inhibit a stimulating signal, trigger application of a stimulating signal, or vary the characteristics, such as the pulse width and amplitude, of a stimulating signal.

主权项

1. A cardiac pacemaker comprising:
a first cardiac chamber lead branch to sense electrical activity in a first cardiac chamber of a heart and to deliver electrical stimulation to the first cardiac chamber; a second cardiac chamber lead branch to sense electrical activity in a second cardiac chamber of the heart and to deliver electrical stimulation to the second cardiac chamber; a controller to manage delivery of electrical pulses to at least one of the first cardiac chamber and the second cardiac chamber based on the electrical activity sensed by at least one of the first cardiac chamber lead branch and the second cardiac chamber lead branch; a signal generator, responsive to the controller, to generate the electrical pulses; a distributor circuit to distribute, responsive to a control signal from the controller, the electrical pulses from the signal generator to the first and second cardiac chambers via the first and second cardiac chamber lead branches; a first clamping circuit connected to the first cardiac chamber lead branch to reduce, under control of the controller, a voltage level of electrical pulses delivered through the first clamping circuit and the first cardiac chamber lead branch; and a second clamping circuit connected to the second cardiac chamber lead branch to reduce, under control of the controller, a voltage level of electrical pulses delivered through the second clamping circuit and the second cardiac chamber lead branch.