Basic Life Support Instructor Practice Test

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What happens during ventricular fibrillation?

The heart pumps efficiently

The heart's electrical activity becomes chaotic

During ventricular fibrillation, the heart's electrical activity becomes chaotic. This condition prevents the heart from contracting in a coordinated manner, leading to ineffective quivering rather than a forceful, organized contraction. As a result, the heart fails to pump blood effectively to the body, which can rapidly lead to a lack of oxygen in vital organs and can be life-threatening.

In the context of basic life support (BLS), recognizing and responding to ventricular fibrillation is critical, as this arrhythmia is a common cause of cardiac arrest. Immediate defibrillation is often necessary to restore a normal heart rhythm. Understanding this chaotic electrical activity helps learners appreciate the urgency of intervention in such emergencies.

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The heart rates stabilize

The patient exhibits clear symptoms of distress

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