What are the signs of cardiac arrest?

• A. Collapse with no response, no heart rate, and no breathing
• B. Lightheadedness
• C. Foot swelling
• D. Fever

Answer: (A)

Recognize the immediate signs of cardiac arrest. When the heart stops pumping effectively, the person typically collapses, becomes unresponsive, and has no detectable pulse and no effective breathing. That combination—collapse, no response, and absent heart and breathing activity—is the hallmark of cardiac arrest and requires urgent action (call emergency services and begin CPR if trained).

Lightheadedness can occur with many conditions and isn’t a definitive sign of cardiac arrest. Foot swelling usually points to chronic issues like heart failure or venous problems, not an abrupt loss of heart function. Fever indicates infection or illness, not cardiac arrest.