Answer :

Final answer:

Excess ventilation during CPR can lead to hyperventilation, which is characterized by abnormally low blood carbon dioxide levels and high blood pH. This can reduce the amount of oxygen transported to critical organs in the body.

Explanation:

Excess ventilation during CPR is harmful because it can lead to a condition called hyperventilation. Hyperventilation is characterized by an increased rate of breathing that leads to abnormally low blood carbon dioxide levels and high (alkaline) blood pH.

This can have negative effects on the body, such as reducing the amount of oxygen that can be transported in the blood stream to critical organs like the heart and brain. Therefore, it is important to ensure proper ventilation techniques are used during CPR to avoid hyperventilation.