Pacemaker with stimulation threshold measuring
First Claim
Patent Images
1. A pacemaker comprising:
- a stimulation threshold measuring unit for measuring a stimulation threshold voltage value of a heart;
a pulse generator for emitting stimulation pulses respectively having variable amplitudes and durations; and
a control unit connected to said pulse generator for setting the respective amplitudes of said stimulation pulses dependent on said threshold voltage value and a safety margin, said control unit automatically changing said safety margin in accordance with a predetermined relationship between said safety margin and said threshold voltage value, to progressively increase said safety margin relative to said threshold voltage value as said threshold voltage value increases.
1 Assignment
0 Petitions
Accused Products
Abstract
A pacemaker has a stimulation threshold measuring unit which measures a stimulation threshold voltage value of a heart and a pulse generator for deliverying stimulation pulses of variable amplitudes and durations to the heart. The pulse generator is controlled by a control unit to deliver the stimulation pulses with respective amplitudes related to the measured threshold value and a safety margin. The control unit automatically changes the safety margin in accordance with a predetermined relationship between the safety margin and the measured threshold value, so that the safety margin is progressively increased as the measured threshold value increases.
15 Citations
3 Claims
-
1. A pacemaker comprising:
-
a stimulation threshold measuring unit for measuring a stimulation threshold voltage value of a heart;
a pulse generator for emitting stimulation pulses respectively having variable amplitudes and durations; and
a control unit connected to said pulse generator for setting the respective amplitudes of said stimulation pulses dependent on said threshold voltage value and a safety margin, said control unit automatically changing said safety margin in accordance with a predetermined relationship between said safety margin and said threshold voltage value, to progressively increase said safety margin relative to said threshold voltage value as said threshold voltage value increases. - View Dependent Claims (2, 3)
-
Specification