1. IEC 60601-2-51: 2003. Medical electrical equipment—part 2-51: particular requirements for safety, including essential performance, of recording and analysing single channel and multichannel electrocardiographs.
2. IEC 60601-2-27: 2005. Medical electrical equipment—part 2-27: particular requirements for safety, including essential performance, of electrocardiographic monitoring equipment.
3. IEC 60601-2-47: 2001. Medical electrical equipment—part 2-47: particular requirements for the safety, including essential performance, of ambulatory electrocardiographic systems.
4. ANSI/AAMI EC11: 1991/(R)2001. Diagnostic electrocardiographic devices.
5. ANSI/AAMI EC-13: 1992. Cardiac monitors, heart rate meters and alarms.