Apparatus and method for detection of sleep disordered breathing

A system comprising:

• a waveform acquisition apparatus operable to detect a physiological signal during discrete time separated detection windows;
• and
• an analyzer, comprising:
• first processing circuitry that derives one or more respiratory disturbance indices from the physiological signal and detects if the one or more respiratory disturbance indices deviate from a threshold value;
• second processing circuitry that interpolates the one or more respiratory disturbance indices between adjacent time separated detection windows;
• and
• third processing circuitry that declares a respiratory disturbance episode based on the detected respiratory disturbance state during the detection windows and the interpolation between detection windows.

An apparatus, comprising:

• electrodes adapted to acquire ECG waveforms from an implanted subcutaneous extrathoracic location of a patient;
• a data acquisition module that captures the ECG waveforms during discrete time separated detection windows;
• and
• an analyzer, comprising:
• first processing circuitry that derives one or more respiratory disturbance indices from the physiological signal and detects if the one or more respiratory disturbance indices deviate from a threshold value;
• second processing circuitry that interpolates the one or more respiratory disturbance indices between adjacent time separated detection windows;
• and
• third processing circuitry that declares a respiratory disturbance episode based on the detected respiratory disturbance state during the detection windows and the interpolation between detection windows.