JRCALC Resuscitation Practice Test 2025 - Free Resuscitation Practice Questions and Study Guide

Inadequate ventilation during CPR can lead to decreased blood flow to the brain due to insufficient oxygen delivery. When a person's breathing is not effectively supported, there is a risk of hypoxia, which is a lack of oxygen reaching the tissues, especially the brain. The brain is highly sensitive to oxygen deprivation, and any decrease in blood oxygen levels can lead to rapid deterioration in brain function. During CPR, the primary goal is to maintain oxygenation and circulation to vital organs, including the brain.

If ventilation is not adequate, carbon dioxide may build up in the bloodstream, further worsening the oxygenation status and potentially leading to loss of consciousness or brain injury. Providing effective breaths during CPR is crucial to ensure that oxygen is delivered to the lungs and subsequently, into the bloodstream, supporting oxygenation of vital organs and preventing further complications.

The other options presented do not accurately reflect the effects of inadequate ventilation. Increased blood pressure is not a direct result of poor ventilation; in fact, inadequate oxygenation could lead to hypotension in a critically ill patient. Prolonged airway obstruction would not directly result from inadequate ventilation but rather could cause ventilatory failure. Enhanced cardiac output is unlikely to occur without adequate ventilation, as sufficient oxygen supply is critical for effective circulation.