The absence of a pulse indicates which condition?

The absence of a pulse indicates which condition?

• A. Cardiac arrest
• B. Stroke
• C. Hypoxia
• D. Arrhythmia

Answer: (A)

Absence of a palpable pulse means the heart isn’t delivering effective blood flow to the body. In emergencies this is most consistent with cardiac arrest, where the heart has stopped pumping enough to create a detectable pulse. Without circulation, tissues (including the brain and lungs) are starved of oxygen very quickly, so unconsciousness and collapse can occur within minutes unless rescue efforts begin immediately. Stroke can cause loss of consciousness, but circulation is not the immediate failure point, so a pulse may still be present. Hypoxia refers to low oxygen levels in the blood and tissues; it affects the body's function but doesn’t by itself imply the heart has stopped beating. Arrhythmia is an abnormal heart rhythm, which can reduce cardiac output and sometimes progress to pulselessness, but the presence or absence of a pulse is most directly tied to cardiac arrest—the event in which the heart fails to pump effectively.

Absence of a palpable pulse means the heart isn’t delivering effective blood flow to the body. In emergencies this is most consistent with cardiac arrest, where the heart has stopped pumping enough to create a detectable pulse. Without circulation, tissues (including the brain and lungs) are starved of oxygen very quickly, so unconsciousness and collapse can occur within minutes unless rescue efforts begin immediately.

Stroke can cause loss of consciousness, but circulation is not the immediate failure point, so a pulse may still be present. Hypoxia refers to low oxygen levels in the blood and tissues; it affects the body's function but doesn’t by itself imply the heart has stopped beating. Arrhythmia is an abnormal heart rhythm, which can reduce cardiac output and sometimes progress to pulselessness, but the presence or absence of a pulse is most directly tied to cardiac arrest—the event in which the heart fails to pump effectively.