초록 ▼

In an implantable pacemaker.backslash.cardioverter.backslash.defibrillator, a system for correlating the delivery of an atrial cardioversion therapy to an optimum blood pressure to effect delivery of the therapy when the volume of the atrium is minimized. In a first embodiment, the blood pressure in

In an implantable pacemaker.backslash.cardioverter.backslash.defibrillator, a system for correlating the delivery of an atrial cardioversion therapy to an optimum blood pressure to effect delivery of the therapy when the volume of the atrium is minimized. In a first embodiment, the blood pressure in the atrium or ventricle is monitored and delivery is timed to a low blood pressure occurring as blood is emptying from the atrium. In a variation ventricular pacing may be provided to ensure that the ventricles are contracting forcefully and at a rate which optimizes atrial emptying. In a second embodiment, the delivery of the cardioversion therapy is also timed to an optimum point or phase of the respiratory cycle. The optimum point or phase of the respiration cycle depends in part on the chamber to be cardioverted and the location of the cardioversion electrodes with respect to the chamber.

대표청구항 ▼

[ We claim:] [1.] A method of effecting cardioversion between cardioversion electrodes implanted in a patient's body comprising the steps of:detecting a tachyarrhythmia of a heart chamber;measuring intracardiac blood pressure during a cardiac cycle for deriving a measured blood pressure value;determ

[ We claim:] [1.] A method of effecting cardioversion between cardioversion electrodes implanted in a patient's body comprising the steps of:detecting a tachyarrhythmia of a heart chamber;measuring intracardiac blood pressure during a cardiac cycle for deriving a measured blood pressure value;determining a minimum blood pressure level in the heart; anddelivering a cardioversion therapy across the cardioversion electrodes timed to substantially coincide with the minimum blood pressure level.