Medical interventional device with accelerometer for providing c

Details Medical interventional device with accelerometer for providing c Medical interventional device with accelerometer for providing c

1994-07-11

1995-12-05

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 6, 607 19, A61N 139

Patent

active

054724538

ABSTRACT:
A medical interventional device adapted to be implanted in the body of a patient provides a plurality of cardiac therapeutic functions including bradycardia pacing, rate adaptive pacing, antitachycardia pacing, cardioversion and defibrillation on demand. An accelerometer in or associated with the device senses accelerational and gravitational effects indicative of at least one of position, posture and physical activity of the patient, and generates an electrical signal representative of the position, posture and physical activity of the patient of which the sensed effect is representative. The accelerometer acts as a transducer to convert mechanical movement to an electrical output representative of such movement. Another sensor detects a physiologic parameter of the patient indicative of cardiac activity of the patient, and generates another electrical signal representative of the cardiac activity. An analyzer is responsive to both of the electrical signals for determining the occurrence of a cardiac dysrhythmia of the patient, and a controller responsive to the determination of cardiac dysrhythmia generates a cardiac therapy of the device for application to the patient's heart appropriate to treat the cardiac dysrhythmia. Hybrid electronic circuitry integrates the accelerometer, analyzer and controller as part of the electrical circuitry of the device.

REFERENCES:
patent: 4905697 (1990-03-01), Heggs et al.
patent: 4922930 (1990-05-01), Adkins et al.
patent: 5010893 (1991-04-01), Sholder
patent: 5014698 (1991-05-01), Cohen

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