Detecting worsening heart failure based on fluid accumulation with respiratory confirmatoin

摘要

A medical device monitors a level of fluid accumulation, e.g., pulmonary edema, and one or more respiratory parameters of the patient to detect worsening heart failure. The medical device may use intrathoracic impedance measurements to monitor both the fluid accumulation and the one or more respiratory parameters. Respiration rate and volume, also referred to as the tidal volume, are examples of respiratory parameters. The medical device examines the one or more respiratory parameters after determining that the fluid accumulation indicates worsening heart failure. In this manner, the medical device uses the one or more respiratory parameters to confirm a determination of worsening heart failure that was made based on the fluid accumulation.

主权项

1. A medical system comprising:
a fluid accumulation monitor configured to monitor thoracic fluid accumulation in a patient; a detection module configured to detect worsening heart failure in the patient, wherein the detection module is configured to determine that the fluid accumulation indicates worsening heart failure in the patient; and a respiratory monitor configured to monitor at least one respiratory parameter of the patient in response to the determination that the fluid accumulation indicates worsening heart failure, wherein the detection module is configured to determine whether the respiratory parameter indicates worsening heart failure in the patient in response to the determination that the fluid accumulation indicates worsening heart failure.