Patent ID: 8843196
Filing Date: 2014-09-23
Classification: A61B,A61N

Abstract:
1. A device, comprising: a housing configured for implantation in a patient; an electrode arrangement configured to electrically couple to a heart of the patient; a detector provided in the housing and coupled to the electrode arrangement, the detector configured to produce a cardiac electrophysiologic signal; energy delivery circuitry provided in the housing and coupled to the electrode arrangement, the energy delivery circuitry configured to deliver at least an antitachycardia electrical therapy to the heart; an implantable blood sensor configured to produce a blood sensor signal; and a processor provided in the housing and coupled to the blood sensor, the detector, and the energy delivery circuitry, the processor configured to discriminate between a tachyarrhythmia requiring antitachycardia electrical therapy and a condition that does not require antitachycardia electrical therapy using the cardiac electrophysiologic signal and the blood sensor signal, the processor configured to assess afterload of a left ventricle of the heart using at least the blood sensor signal.