When carrying out resuscitation measures, the victim (patient) may hear a cracking or crunching sound. This indicates a reduced level of chest elasticity during cardiac massage. It also means that the chest compression is too strong, or the position of the arms is incorrect, or both.
In such a situation, the rescuer must select the necessary force of pushes and check the correct placement of the palms on the chest and make sure that the palms are located on the chest.
Do not stop resuscitation efforts. Only in this case does the victim (patient) have a chance to survive.