Which of the following indicates a decrease in cardiac output?

Which of the following indicates a decrease in cardiac output?

• A. Increased heart rate
• B. Weak peripheral pulses
• C. High blood pressure
• D. Cyanosis

Answer: (B)

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.

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.