Damped biphasic energy delivery circuit for a defibrillator

A method for delivering a damped biphasic truncated defibrillation pulse to a patient, comprising:

• coupling a defibrillator via pair of electrodes to said patient;
• initiating delivery of a first phase of said damped biphasic truncated defibrillation pulse to said patient;
• measuring a patient dependent parameter during said delivery of said first phase;
• and
• determining a first and second phase duration of said damped biphasic truncated defibrillation pulse based on said patient dependent parameter.

A method for delivering a damped biphasic truncated defibrillation pulse to a patient, comprising:

• coupling a defibrillator via pair of electrodes to said patient;
• measuring a patient dependent parameter of said patient;
• determining first and second phase durations of said damped biphasic truncated defibrillation pulse based on said patient parameter;
• and
• delivering said damped biphasic truncated defibrillation pulse to said patient according to said first and second phase durations.

A defibrillator comprising

• a pair of electrodes for coupling to a patient;
• an HV switch coupled to said pair of electrodes;
• an energy storage circuit for generating a damped biphasic truncated defibrillation pulse;
• and
• a controller coupled to said HV switch and to said energy storage circuit;
• wherein said controller initiates delivery of said damped biphasic truncated defibrillation, measures a patient dependent parameter, and determines first and second phase durations of said damped biphasic truncated defibrillation pulse based on said patient dependent parameter.