Certified Emergency Nurse (CEN) Practice Test

What is the most common affected area in blunt cardiac injury?

1. Right Atrium

2. Left Ventricle

3. Right Ventricle

4. Left Atrium

The correct answer is: Right Ventricle

In cases of blunt cardiac injury, the most commonly affected area is the right ventricle. This is primarily due to its anatomical position and structure; the right ventricle is positioned at the anterior aspect of the heart, making it more susceptible to trauma during blunt force impacts, such as in motor vehicle accidents or falls. When blunt trauma occurs, the right ventricle is likely to sustain damage due to its thin muscular wall and the fact that it is in direct contact with the chest wall. This can lead to contusions, ruptures, or other forms of injury, significantly impacting cardiac function. Understanding the vulnerability of the right ventricle is crucial for emergency medical professionals, as prompt identification and treatment of any injuries to this area are necessary to prevent complications, such as cardiac tamponade or reduced cardiac output, which can lead to critical situations in a trauma patient. The other areas of the heart, such as the right atrium and the left atrium, are less commonly affected in blunt injuries, while the left ventricle, although potentially injured, is more protected due to its position in the thorax and its muscular structure.