In vfib, what is the expected outcome for cardiac output?

• A. Normal output
• B. Increased output
• C. No cardiac output
• D. Variable output

Answer: (C)

In ventricular fibrillation (vfib), the heart's electrical activity becomes chaotic, leading to ineffective contractions of the heart muscle. This disorganization prevents the heart chambers, particularly the ventricles, from contracting in a coordinated manner, which is essential for pumping blood effectively throughout the body.

As a result, there is a complete loss of effective cardiac output. The heart is unable to generate sufficient pressure to propel blood forward, leading to the cessation of blood circulation. This is why the expected outcome for cardiac output in vfib is categorized as "no cardiac output."

In contrast, normal output, increased output, or variable output would imply some degree of effective heart function, which does not occur during vfib. Hence, the understanding that vfib results in no cardiac output is crucial for assessing the urgency of treatment and interventions required to restore normal heart rhythm and circulation.