American Association of Critical-Care Nurses (AACN) Certification Practice Test

What is the normal right atrial pressure range?

1. 0-2 mm Hg

2. 2-6 mm Hg

3. 5-10 mm Hg

4. 10-15 mm Hg

The correct answer is: 2-6 mm Hg

The normal range for right atrial pressure is typically between 2-6 mm Hg. This range is considered standard in assessing right atrial function and overall cardiac performance. Right atrial pressure can provide insight into the patient's volume status and can be an important marker of right heart function. The reason this range is significant is that it reflects the filling pressures of the right atrium, which can be influenced by various factors, including intravascular volume, ventricular function, and pressure in the pulmonary circulation. Understanding this normal range helps healthcare providers in diagnosing conditions such as heart failure, right ventricular dysfunction, or fluid overload. By knowing what constitutes normal pressure, clinicians can better interpret diagnostic tests and make informed decisions regarding patient management. In contrast, pressures outside this range may indicate pathophysiological conditions that may require further investigation or intervention. A lower pressure can suggest hypovolemia, while a higher pressure may indicate congestive heart failure or increased systemic vascular resistance. Thus, the knowledge of the normal right atrial pressure range is crucial for effective clinical assessment and treatment planning.