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Patient respiration may be characterized using a marked respiration waveform involving a respiration waveform annotated with symbols, markers or other indicators representing one or more respiration characteristics. A respiration waveform may be acquired by sensing a physiological parameter modulate

Patient respiration may be characterized using a marked respiration waveform involving a respiration waveform annotated with symbols, markers or other indicators representing one or more respiration characteristics. A respiration waveform may be acquired by sensing a physiological parameter modulated by respiration. A marked respiration waveform may be generated based on the acquired respiration waveform and one or more detected respiration waveform characteristics and/or respiration-related conditions. One or more components used to generate the marked respiratory waveform may be fully or partially implantable.

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What is claimed is: 1. A system for characterizing respiration of a patient, comprising: a respiration waveform sensor configured to acquire a respiration waveform; a respiration processor configured to determine one or more characteristics associated with the respiration and comprising a trigger c

What is claimed is: 1. A system for characterizing respiration of a patient, comprising: a respiration waveform sensor configured to acquire a respiration waveform; a respiration processor configured to determine one or more characteristics associated with the respiration and comprising a trigger circuit configured to detect a triggering event, the one or more characteristics including a first respiration characteristic and a second respiration characteristic different from the first respiration characteristic; and a waveform generator coupled to the respiration waveform sensor and the respiration processor, the waveform generator configured to generate a marked respiration waveform comprising the respiration waveform and symbols indicating the one or more characteristics associated with the respiration, the generation of the marked respiration waveform being activated in response to the detection of the triggering event, and the symbols including a first symbol indicating the first respiration characteristic and a second symbol indicating the second respiration characteristic, the first and second symbols being aligned relative to the respiration waveform to indicate times of occurrence of the first and second respiration characteristics respectively; wherein at least one of the respiration waveform sensor, the respiration processor, and the waveform generator comprises an implantable component; and wherein the respiration processor is further configured to distinguish between different types of disordered breathing, and the first respiration characteristic comprises a type of disordered breathing selected from the different types of disordered breathing. 2. The system of claim 1, wherein the type of the disordered breathing comprises central disordered breathing. 3. The system of claim 1, wherein the type of the disordered breathing comprises obstructive disordered breathing. 4. The system of claim 1, wherein the type of the disordered breathing comprises mixed central and obstructive disordered breathing. 5. The system of claim 1, wherein the type of the disordered breathing comprises apnea. 6. The system of claim 1, wherein the type of the disordered breathing comprises hypopnea. 7. The system of claim 1, wherein the type of the disordered breathing comprises mixed apnea and hypopnea. 8. The system of claim 1, wherein the type of the disordered breathing comprises Cheyne-Stokes respiration. 9. The system of claim 1, wherein the type of the disordered breathing comprises periodic breathing. 10. The system of claim 1, wherein the type of the disordered breathing comprises sleep disordered breathing. 11. A system for characterizing respiration of a patient, comprising: a respiration waveform sensor configured to acquire a respiration waveform; a respiration processor configured to determine one or more characteristics associated with the respiration and comprising a trigger circuit configured to detect a triggering event, the one or more characteristics including a first respiration characteristic and a second respiration characteristic different from the first respiration characteristic; and a waveform generator coupled to the respiration waveform sensor and the respiration processor, the waveform generator configured to generate a marked respiration waveform comprising the respiration waveform and symbols indicating the one or more characteristics associated with the respiration, the generation of the marked respiration waveform being activated in response to the detection of the triggering event, and the symbols including a first symbol indicating the first respiration characteristic and a second symbol indicating the second respiration characteristic, the first and second symbols being aligned relative to the respiration waveform to indicate times of occurrence of the first and second respiration characteristics respectively; wherein at least one of the respiration waveform sensor, the respiration processor, and the waveform generator comprises an implantable component; and wherein the one or more characteristics associated with the respiration comprises a respiration volume. 12. A system for characterizing respiration of a patient, comprising: a respiration waveform sensor configured to acquire a respiration waveform; a respiration processor configured to determine one or more characteristics associated with the respiration and comprising a trigger circuit configured to detect a triggering event, the one or more characteristics including a first respiration characteristic and a second respiration characteristic different from the first respiration characteristic; and a waveform generator coupled to the respiration waveform sensor and the respiration processor, the waveform generator configured to generate a marked respiration waveform comprising the respiration waveform and symbols indicating the one or more characteristics associated with the respiration, the generation of the marked respiration waveform being activated in response to the detection of the triggering event, and the symbols including a first symbol indicating the first respiration characteristic and a second symbol indicating the second respiration characteristic, the first and second symbols being aligned relative to the respiration waveform to indicate times of occurrence of the first and second respiration characteristics respectively; wherein at least one of the respiration waveform sensor, the respiration processor, and the waveform generator comprises an implantable component; and wherein the one or more characteristics associated with the respiration comprises minute ventilation. 13. A system for characterizing respiration of a patient, comprising: a respiration waveform sensor configured to acquire a respiration waveform; a respiration processor configured to determine one or more characteristics associated with the respiration and comprising a trigger circuit configured to detect a triggering event, the one or more characteristics including a first respiration characteristic and a second respiration characteristic different from the first respiration characteristic; and a waveform generator coupled to the respiration waveform sensor and the respiration processor, the waveform generator configured to generate a marked respiration waveform comprising the respiration waveform and symbols indicating the one or more characteristics associated with the respiration, the generation of the marked respiration waveform being activated in response to the detection of the triggering event, and the symbols including a first symbol indicating the first respiration characteristic and a second symbol indicating the second respiration characteristic, the first and second symbols being aligned relative to the respiration waveform to indicate times of occurrence of the first and second respiration characteristics respectively; wherein at least one of the respiration waveform sensor, the respiration processor, and the waveform generator comprises an implantable component; and wherein the one or more characteristics associated with the respiration comprises expiration slope. 14. A system for characterizing respiration of a patient, comprising: a respiration waveform sensor configured to acquire a respiration waveform; a respiration processor configured to determine one or more characteristics associated with the respiration and comprising a trigger circuit configured to detect a triggering event, the one or more characteristics including a first respiration characteristic and a second respiration characteristic different from the first respiration characteristic; and a waveform generator coupled to the respiration waveform sensor and the respiration processor, the waveform generator configured to generate a marked respiration waveform comprising the respiration waveform and symbols indicating the one or more characteristics associated with the respiration, the generation of the marked respiration waveform being activated in response to the detection of the triggering event, and the symbols including a first symbol indicating the first respiration characteristic and a second symbol indicating the second respiration characteristic, the first and second symbols being aligned relative to the respiration waveform to indicate times of occurrence of the first and second respiration characteristics respectively; wherein at least one of the respiration waveform sensor, the respiration processor, and the waveform generator comprises an implantable component; and wherein the one or more characteristics associated with the respiration comprises expiration volume. 15. A system for characterizing respiration of a patient, comprising: a respiration waveform sensor configured to acquire a respiration waveform; a respiration processor configured to determine one or more characteristics associated with the respiration and comprising a trigger circuit configured to detect a triggering event, the one or more characteristics including a first respiration characteristic and a second respiration characteristic different from the first respiration characteristic; and a waveform generator coupled to the respiration waveform sensor and the respiration processor, the waveform generator configured to generate a marked respiration waveform comprising the respiration waveform and symbols indicating the one or more characteristics associated with the respiration, the generation of the marked respiration waveform being activated in response to the detection of the triggering event, and the symbols including a first symbol indicating the first respiration characteristic and a second symbol indicating the second respiration characteristic, the first and second symbols being aligned relative to the respiration waveform to indicate times of occurrence of the first and second respiration characteristics respectively; wherein at least one of the respiration waveform sensor, the respiration processor, and the waveform generator comprises an implantable component; and wherein the respiration processor is configured to detect the one or more characteristics associated with the respiration based on morphological features of the respiratory waveform.