Cardiac arrest is best described as which of the following?

Cardiac arrest is best described as which of the following?

• A. A medical emergency characterized by sudden collapse, unresponsiveness, no breathing, or only gasping, and no pulse.
• B. A gradual onset of shortness of breath
• C. A condition with normal pulse and breathing
• D. A severe allergic reaction

Answer: (A)

Cardiac arrest is an abrupt, life-threatening event in which the heart stops pumping effectively. The hallmark signs are a person who collapses suddenly, is unresponsive, is not breathing normally (or only gasping), and has no detectable pulse. Those features show that circulation and oxygen delivery to the body have ceased, which is why immediate action is needed. This description doesn’t fit a gradual onset of shortness of breath, which implies a slowly developing respiratory or cardiac issue rather than an immediate loss of circulation. It also isn’t described by having a normal pulse and breathing, which would indicate the person is not in cardiac arrest. A severe allergic reaction can cause collapse and breathing difficulties, but cardiac arrest specifically involves a sudden collapse with no pulse and no effective breathing, signaling a complete loss of circulation. The practical takeaway is to recognize these signs right away and respond by calling for help and starting CPR, with an AED ready to use as soon as possible.

Cardiac arrest is an abrupt, life-threatening event in which the heart stops pumping effectively. The hallmark signs are a person who collapses suddenly, is unresponsive, is not breathing normally (or only gasping), and has no detectable pulse. Those features show that circulation and oxygen delivery to the body have ceased, which is why immediate action is needed.

This description doesn’t fit a gradual onset of shortness of breath, which implies a slowly developing respiratory or cardiac issue rather than an immediate loss of circulation. It also isn’t described by having a normal pulse and breathing, which would indicate the person is not in cardiac arrest. A severe allergic reaction can cause collapse and breathing difficulties, but cardiac arrest specifically involves a sudden collapse with no pulse and no effective breathing, signaling a complete loss of circulation.

The practical takeaway is to recognize these signs right away and respond by calling for help and starting CPR, with an AED ready to use as soon as possible.