Final answer:
The most effective method of monitoring the success of resuscitation during CPR is using an electrocardiogram (ECG) to monitor the heart rhythm.
Step-by-step explanation:
The most effective method of monitoring the success of resuscitation during CPR is using an electrocardiogram (ECG) to monitor the heart rhythm. An ECG provides real-time information about the heart's electrical activity, allowing healthcare professionals to determine if the compressions and other resuscitative measures are effective. It provides a visual representation of the heart's rhythm and can help identify any abnormal patterns or issues that may require intervention.