1. A platform adapted to provide electrical stimulation to a patient's heart and to receive data from physiologic instrumentation coupled to the patient, said platform comprising: a controller comprising a digital processor and a digital memory, wherein the controller operatively provides electrical stimulation therapy to the patient's heart responsive to the data from the physiologic instrumentation; and an interface electrically coupling the controller to the physiologic instrumentation; and wherein the digital memory comprises software instructions executable by the digital processor to receive the data via the interface and to process the data using a modeling algorithm which simulates operations of analog amplifier circuitry to control delivery of the electrical stimulation.