Paramedic National Registry Practice

What is classified as a static cardiac rhythm?

1. Third Degree Block

2. Atrial Fibrillation

3. Ventricular Tachycardia

4. Bradycardia

The correct answer is: Third Degree Block

The classification of a static cardiac rhythm refers to a rhythm that remains constant or stable over time, rather than one that varies. A third-degree block, also known as complete heart block, is characterized by the absence of conduction between the atria and ventricles. This results in a stable rhythm where the atria and ventricles beat independently of each other, leading to a consistent, if not optimal, heart rate. In contrast, atrial fibrillation is an example of a dynamic rhythm, where there is chaotic electrical activity, resulting in an irregular and often rapid heart rate. Similarly, ventricular tachycardia is a rapid heart rhythm originating from the ventricles, indicating a potentially unstable situation. Bradycardia, while it may present as a slow but stable rhythm, can vary depending on the underlying condition and is not typically classified as static in the same way third-degree heart block is. Thus, third-degree block exemplifies a rhythm that does not change over time, reinforcing its classification as a static cardiac rhythm.