What does a weak or thready pulse indicate?

A weak or thready pulse indicates reduced blood flow through the arteries. This can occur due to various conditions that affect the heart's ability to pump blood effectively or cause changes in blood volume. For example, factors such as shock, dehydration, or heart failure can lead to a reduced volume of blood circulating, making the pulse less forceful. When the pulse feels weak or thready, it is often a sign that the body is not getting adequate perfusion, which is critical for delivering oxygen and nutrients to tissues. Monitoring the characteristics of the pulse can provide important insights into a patient's cardiovascular status, guiding further assessment and interventions.