Which of the following is a sign of cardiac arrest?

In a situation of cardiac arrest, the heart is no longer effectively pumping blood, leading to the absence of a heartbeat. This is a critical indicator because, without a heartbeat, blood cannot circulate to vital organs, resulting in the loss of consciousness and, eventually, death if not treated immediately. Recognizing the absence of a heartbeat is essential for emergency responders and bystanders, as it directly informs them that immediate intervention, such as calling emergency services and initiating CPR, is necessary.

Normal breathing, responsiveness to stimuli, and warm skin are not signs of cardiac arrest; instead, they may indicate that a person is still stable or only suffering from a less severe medical condition. It’s the lack of a heartbeat that distinctly signals cardiac arrest, prompting urgent action to restore heart function and circulation.