capacitor 106 effectively operates as a 50 v d c voltage source as illustrated in fig9 a voltage level of approximately 27 mv provided to the drive input of driver circuits 117 a and 117 c is sufficient to deliver an 8 ma 200 mv pacing pulse into a patient 102 presenting a 25 u03c9 load as illustrated in fig1 a voltage level of approximately 465 mv is sufficient to deliver an 140 ma 42 v pacing pulse into a patient 102 presenting a 300 u03c9 load by appropriately controlling the phase profile 120 pacing pulses ranging from a few milliamps to two hundred milliamps or more may be provided to a patient using the same circuit topology as that used to deliver a defibrillating shock it should be appreciated that although embodiments of the present invention have been primarily described with respect to defibrillation and pacing they may also be used to deliver other types of therapeutic waveforms to the body of a patient in which the energy delivered is between the ranges of energy typically used for pacing or defibrillation for example pacing pulses typically range from a few ma to approximately 200 ma and defibrillation pulses typically range from about 1 a to about 35 40 a between these ranges.