Which of the following indicates a decrease in cardiac output?

Study for the NOLS Wilderness Emergency Medical Technician (WEMT) Test with flashcards and multiple-choice questions, each offering hints and explanations. Prepare for your exam confidently!

A decrease in cardiac output typically manifests through various physiological signs, and weak peripheral pulses are one of the key indicators. When cardiac output is reduced, there is less blood volume being pumped out of the heart per minute. This can lead to weaker blood flow in the peripheral areas, resulting in weak or diminished peripheral pulses.

In contrast, increased heart rate can be a compensatory mechanism in response to low cardiac output, as the body attempts to maintain adequate circulation and perfusion. High blood pressure might occur in some instances of decreased cardiac output due to other factors, but it is not a direct indicator of decreased output. Cyanosis, which is a bluish discoloration of the skin due to inadequate oxygenation, indicates poor perfusion but is not specifically tied to cardiac output; it can arise from various respiratory or circulatory issues.

Thus, weak peripheral pulses effectively signify a compromise in the heart's ability to maintain sufficient blood flow, directly correlating with decreased cardiac output.

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