A rapid, regular and full pulse is most consistent with which condition?

• A. Fright, fever, high blood pressure, first stages of blood loss
• B. Shock
• C. Dehydration
• D. Cardiac arrest

Answer: (A)

A rapid, regular, full pulse signals that the heart is beating quickly but still delivering solid stroke volume, with the vessels well filled. This pattern fits situations where the body is activated or under increased metabolic demand but volume is still adequate or only beginning to be challenged. Fright or fever ramps up sympathetic activity and heart rate, and hypertension tends to be associated with a strong, detectable pulse due to higher arterial pressure and stroke volume. In the early stages of blood loss, compensatory mechanisms can maintain a strong, regular pulse as the heart works harder to preserve circulation before the volume loss becomes profound.

As a condition progresses to shock, dehydration, or cardiac arrest, the pulse changes: shock and significant blood loss eventually produce a weak or thready pulse as volume and perfusion drop; dehydration often yields a fast but sometimes weak pulse due to reduced circulating volume; cardiac arrest results in no pulse at all.