Patient ECG recording control for an automatic implantable defib

Details Patient ECG recording control for an automatic implantable defib Patient ECG recording control for an automatic implantable defib

1985-04-09

1986-12-02

Kamm, William E.

Surgery

Truss

Pad

128903, A61N 132

Patent

active

046257306

ABSTRACT:
An implantable automatic defibrillator includes sensors which are placed on or near the patient's heart to detect electrical signals indicative of the physiology of the heart. The signals are digitally converted and stored into a FIFO region of a RAM by operation of a direct memory access (DMA) controller. The DMA controller operates transparently with respect to the microprocessor which is part of the defibrillator. The implantable defibrillator includes a telemetry communications circuit for sending data outbound from the defibrillator to an external device (either a patient controller or a physician's console or other) and a receiver for sensing at least an externally generated patient ECG recording command signal. The patient recording command signal is generated by the hand held patient controller. Upon detection of the patient ECG recording command, DMA copies the contents of the FIFO into a specific region of the RAM.

REFERENCES:
patent: 4223678 (1980-09-01), Langer et al.
patent: 4250888 (1981-02-01), Grosskopf
patent: 4295474 (1981-10-01), Fischell
patent: 4407288 (1983-10-01), Langer et al.
patent: 4545030 (1985-10-01), Kitchin
Programmable Implantable Medication System (PIMS) Transceiver, A. F. Hogrefe et al., Proceedings of the 7th International Symposium on Biotelemetry, Aug. 15-20, 1982, Stanford, California, pp. 5-8.

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