Profile: Cardioline Inc specializes in ECG monitoring and diagnostic equipment such as electrocardiographs, stress testing systems, holter monitoring systems, defibrillators & related supplies & accessories. We produced the first electrocardiograph under the Cardioline® trademark. Our current AR series electrocardiographs contains an easy one touch automatic operation, an alphanumeric keypad and advanced linear phase digital filters to eliminate interference without altering ECG morphology.