Burdick E350 Features The Burdick E350 has a microprocessor based electrocardiograph, designed to produce accurate records with maximum definition and fidelity. The Burdick E350 also has electrically isolated patient leads for patient safety. A self-check of the micro-processor circuitry is performed each time the unit is turned on. Meets all A.H.A specifications for frequency response and leakage current. A microprocessor based electrocardiograph, designed to produce accurate records with maximum definition and fidelity. Electrically isolated patient leads for patient safety. A self-check of the micro-processor circuitry is performed each time the unit is turned on.