Final answer:
An increased frequency between QRS complexes typically indicates a higher heart rate. The QRS complex signals ventricular contraction, so more frequent QRS complexes cause the heart to pump more often. Abnormalities like second or third-degree heart blocks can lead to slower heart rates or require intervention according to the Adult Tachycardia Algorithm.
Step-by-step explanation:
When discussing the Adult Tachycardia Algorithm Step 2: Stable, Normal QRS, it is pivotal to understand how changes in the electrical activity of the heart, as depicted on an Electrocardiogram (ECG), can impact the heart rate (pulse). A normal ECG tracing includes a P wave, QRS complex, and T wave. In the context of atrial fibrillation, there is an abnormal electrical pattern before the QRS complex and the frequency of QRS complexes increases. As a result, with an increase in the frequency between QRS complexes, one would expect an increase in heart rate. This accelerated heart rate is because the QRS complex represents the depolarization of ventricles, leading to their contraction and thereby pumping blood to the body, which would occur more frequently with increased QRS frequency.
In cases such as a second-degree heart block, not all P waves are followed by a QRS complex, resulting in a slower heart rate. Moreover, in more severe cases like a third-degree block, there is no correlation between the P wave and the QRS complex, often leading to a different pacemaker taking over, which can drastically alter heart rate. Understanding these patterns is crucial for managing tachycardia using the Adult Tachycardia Algorithm.