What does pulseless electrical activity (PEA) refer to?

What does pulseless electrical activity (PEA) refer to?

• A. Strong electrical signals with a detectable pulse
• B. Weak electrical signals with no mechanical response
• C. Regular electrical activity and mechanical function
• D. Electrical activity is absent

Answer: (B)

Pulseless electrical activity (PEA) refers to a condition in which there is discernible electrical activity on an electrocardiogram (ECG), but the heart is not effectively contracting to produce a detectable pulse. In this scenario, the heart's electrical signals may appear normal or even strong, yet there is no corresponding mechanical response leading to blood circulation. This indicates a disconnect between the electrical impulses that trigger heartbeats and the physical ability of the heart muscle to contract, often due to various underlying conditions such as severe hypovolemia, cardiac tamponade, or severe electrolyte imbalances. The emphasis on weak electrical signals aligns with the concept of the mechanical failure despite electrical activity being present, confirming that it describes a state where the heart cannot pump blood effectively, resulting in the absence of a pulse.