摘要:
A method and apparatus are provided for protecting cardiac tissue from insult. The method comprises identifying the occurrence of an insult, such as a heart attack, and delivering electrical stimulation to one or more predetermined nerves in a patient's body in response to identifying the occurrence of the insult. The stimulation may be provided at the spinal canal or on the chest wall of the patient through cutaneous electrodes.
摘要:
Neurostimulation is delivered to one or more predetermined locations on or within a patient in order to treat effects of sleep apnea by modulating autonomic nervous activity. Delivery of neurostimulation at predetermined locations can decrease sympathetic nervous activity and/or increase parasympathetic nervous activity, countering the increased intrinsic sympathetic activity associated with apnea-arousal cycles. In some embodiments, neurostimulation is delivered to the spinal cord of the patient via an implanted electrode. In other embodiments, neurostimulation is delivered transcutaneously to the spinal cord or other locations via electrodes located on the surface of the patient. In some embodiments, delivery of neurostimulation is initiated or modified in response to detection of apneas.
摘要:
A method and apparatus are used to provide therapy to a patient experiencing ventricular dysfunction or heart failure. At least one electrode is located in a region associated with nervous tissue, such as nerve bundles T1-T4, in a patient's body. Electrical stimulation is applied to the at least one electrode to improve the cardiac efficiency of the patient's heart. One or more predetermined physiologic parameters of the patient are monitored, and the electrical stimulation is adjusted based on the one or more predetermined physiologic parameters.
摘要:
A method and apparatus are used to provide therapy to a patient experiencing ventricular dysfunction or heart failure. At least one electrode is located in a region associated with nervous tissue, such as nerve bundles T1-T4, in a patient's body. Electrical stimulation is applied to the at least one electrode to improve the cardiac efficiency of the patient's heart. One or more predetermined physiologic parameters of the patient are monitored, and the electrical stimulation is adjusted based on the one or more predetermined physiologic parameters.
摘要:
A method and apparatus for delivering corrective therapy through hormone regulation is provided. Inhibition of sympathetic fibers by spinal cord stimulation is used to regulate the levels of hormones such as catecholamines, renin, and calcitonin gene-related peptide. The invention utilizes a closed or open loop feedback system in which physiological parameters such as the concentrations of hormones and sympathetic indicators such as heart rate and urine production are monitored and used to determine the appropriate level of neurostimulation. The site of electrical stimulation includes, but is not limited to, the spinal cord at levels T7-L2 and the associated neural fibers within a region of the T7-L2 dermatomes.
摘要:
Electrical crosstalk between two implantable medical devices or two different therapy modules of a common implantable medical device may be evaluated, and, in some examples, mitigated. In some examples, one of the implantable medical devices or therapy modules delivers electrical stimulation to a nonmyocardial tissue site or a nonvascular cardiac tissue site, and the other implantable medical device or therapy module delivers cardiac rhythm management therapy to a heart of the patient.
摘要:
Techniques for minimizing interference between the first and second medical devices or between the different therapy modules of a common medical device are described herein. In some examples, a medical device may include shunt-current mitigation circuitry and/or at least one clamping structure that helps minimize or even eliminate shunt-current that feeds into a first therapy module of the medical device via one or more electrodes electrically connected to the first therapy module. The shunt-current may be generated by the delivery of electrical stimulation by a second therapy module. The second therapy module may be enclosed in a common housing with the first therapy module or may be separate, e.g., a part of a separate medical device.
摘要:
The disclosure herein relates generally to methods for treating heart conditions using vagal stimulation, and further to systems and devices for performing such treatment. Such methods may include monitoring physiological parameters of a patient, detecting cardiac conditions, and delivering vagal stimulation (e.g., electrical stimulation to the vagus nerve or neurons having parasympathetic function) to the patient to treat the detected cardiac conditions.
摘要:
A medical device system and associated method discriminating conditions that includes a plurality of sensors, a sensing module coupled to the plurality of sensors and configured to acquire signals from the plurality of sensors, and a processor coupled to the sensing module and configured to determine a change in a respiratory related sounds in response to a signal from a sensor of the plurality of sensors, select one or more sensors of the plurality of sensors associated with the determined change, determine a respiratory signature in response to signals from the selected one or more sensors, and determine the respiratory condition in response to the determined respiratory signature.
摘要:
A medical device system and associated method discriminate respiratory and cardiac conditions using respiratory sounds. A sensing module acquires a first signal and a second signal, at least the second signal acquired from an acoustic transducer. A processor is configured to receive the first signal and to control the sensing module to acquire the second acoustic signal in response to a change in the first signal. The processor discriminates between a cardiac condition and a respiratory condition as a cause of the change in the first signal in response to the second acoustic signal.