| 摘要 |
A method and apparatus for testing and detecting capture of the heart in response to a pacing pulse energy. The method includes deriving and storing stimulation threshold data and adjusting pacing pulse energy for energy efficiency. In one aspect of the invention, a pacing pulse is delivered via an electrode and the electrical signal is sensed using the electrode. Further, the amplitude of the sensed electrical signal is monitored over time. A polarization related amplitude of the sensed electrical signal is also determined from a second amplitude of the sensed electrical signal. The polarization related amplitude that is determined using the foregoing process is implemented to define a variable sensing threshold that decreases with time. Subsequently, the delivered pacing pulse responsive to the amplitude exceeding the variable sensing threshold for a defined duration is used to detect capture.
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