Implantable cardioverter defibrillator (ICD), subcutaneous implantable cardioverter defibrillator (SICD), and waveform energy control systems

摘要

Cardiac defibrillation or cardioversion waveform energy control systems employ transvenous ICDs, subcutaneous SICDs, or pacemakers for treating cardiac conditions. The systems comprise differentially driven amplifier circuit operational modes to control the delivery of pacing, anti-tachycardia pacing, defibrillation, and/or cardioversion electrical shocks, wherein the pacing, anti-tachycardia pacing, and shock waveforms employ constant current, constant voltage, or constant energy. Biphasic arbitrary shock waveforms deliver increasing energy with increasing time as represented by phase 1 ascending ramp, ascending exponential, ascending chopped, ascending stepped, ascending curved, square, or rectilinear and/or any combination of geometric shaped ascending arbitrary waveforms or any BTE waveform.

主权项

1. A waveform energy control system for treating a cardiac condition in a patient, which comprises:
a microcontroller; a digital-to-analog converter (DAC); and differentially driven amplifier circuits having an input and an output, wherein the microcontroller is operatively connected to the DAC, the DAC is operatively connected to the input of the differentially driven amplifier circuits, the microcontroller is configured to respond to software commands to generate signals to the DAC, the DAC provides signals to the input of the differentially driven amplifier circuits, and the output of the differentially driven amplifier circuits delivers constant current, constant voltage, or constant energy ascending arbitrary waveforms, biphasic truncated exponential (BTE) waveforms, or ascending arbitrary and BTE waveforms for pacing, anti-tachycardia pacing (ATP), low-voltage therapy, defibrillation, or cardioversion electrical shocks to the patient's heart.