Method and system for hospital, emt/ems, and aed grade external defibrillation and transcutaneous pacing

An apparatus for treating a cardiac condition in a human or animal patient, comprising at least two electrode patches or paddles for contacting an area of skin of the patient, wherein the at least two electrode patches or paddles are capable of applying voltage and current in a rotational manner to pre-stimulate that area using a servo amplifier array and are capable of then delivering a high voltage shock through the patient's heart to effect defibrillation or cardioversion.

In an improved system for defibrillation or cardioversion wherein shock waveforms are applied externally through a patient's heart, the improvement wherein all external defibrillation and/or cardioversion waveforms, pre-stimulus waveforms, and external pacing waveforms and capabilities employ ascending, level or any arbitrary geometry waveforms that are delivered using amplifier circuit topologies for successful cardioversion, defibrillation and/or external pacing therapies.

In an improved system for defibrillation or cardioversion wherein shock waveforms are applied externally through a patient's heart, the improvement wherein the ideal output waveform is constructed from discrete points in time or equations stored in the uC which at each discrete time point, on the order of microseconds, the uC outputs a new waveform value thru a Digital to Analog converter (DAC) to the amplifiers and at each discrete time point, the current through the load is digitally converted using an Analog to Digital converter (ADC) using a digitized current that is averaged over multiple time samples to create a rolling average and whereby this rolling current average is used by the uC to calculate power and energy in real time for each discrete time point of the ideal output waveform in which the uC then increases or decreases the ideal output waveform to maintain the desired constant current or to achieve the desired total energy at the completion of the waveform, wherein current sense resistors provide electronic feedback to an uP for controlling the delivered servo amplifier voltages and currents.