In addition to complying with 1.1 of KS C IEC 60601-1, this standard adds the following.
KS C IEC 60601-2-4:2008 history
2021KS C IEC 60601-2-4:2021 Medical electrical equipment —Part 2-4: Particular requirements for the basic safety and essential performance of cardiac defibrillators
2017KS C IEC 60601-2-4:2017 Medical electrical equipment — Part 2-4: Particular requirements for the basic safety and essential performance of cardiac defibrillators