Cyanosis is a common sign of congenital heart disease, appearing as a bluish discoloration due to poor circulation or inadequate oxygenation. Which of the following describes this sign?

Cyanosis is a common sign of congenital heart disease, appearing as a bluish discoloration due to poor circulation or inadequate oxygenation. Which of the following describes this sign?

• A. Cyanosis
• B. Edema
• C. Jaundice
• D. Erythema

Answer: (A)

Cyanosis is the bluish discoloration of the skin and mucous membranes that comes from low oxygen levels in the blood. In congenital heart disease this sign appears when there is hypoxemia or abnormal mixing of oxygenated and deoxygenated blood, so tissues don’t get enough oxygen. It is most evident in areas with thin skin or mucous membranes, such as the lips, tongue, and nail beds, and it can be central (lips/t tongue) indicating systemic hypoxemia or peripheral (in the extremities) from poor perfusion or cold. This makes the sign described the best match: a bluish color signaling insufficient oxygenation. The other options describe different problems: edema is swelling from fluid buildup, jaundice is yellowing from high bilirubin, and erythema is redness from increased blood flow or inflammation.

Cyanosis is the bluish discoloration of the skin and mucous membranes that comes from low oxygen levels in the blood. In congenital heart disease this sign appears when there is hypoxemia or abnormal mixing of oxygenated and deoxygenated blood, so tissues don’t get enough oxygen. It is most evident in areas with thin skin or mucous membranes, such as the lips, tongue, and nail beds, and it can be central (lips/t tongue) indicating systemic hypoxemia or peripheral (in the extremities) from poor perfusion or cold.

This makes the sign described the best match: a bluish color signaling insufficient oxygenation. The other options describe different problems: edema is swelling from fluid buildup, jaundice is yellowing from high bilirubin, and erythema is redness from increased blood flow or inflammation.