Final answer:
In cardioversion, 'vers/o-' stands for 'turning' or 'changing', referring to the restoration of a normal heart rhythm through a controlled electric shock.
Step-by-step explanation:
In the medical procedure known as cardioversion, the combining form vers/o- refers to turning or changing. Cardioversion is a treatment method that involves the delivery of a controlled electric shock to the heart to restore a normal heart rhythm in cases of arrhythmia. It is a critical procedure for patients experiencing severe arrhythmia symptoms, and it often follows the administration of blood thinners to reduce the risk of complications.