What characterizes atrial tachycardia?

Atrial tachycardia is characterized by a regular rhythm that typically ranges from 140 to 250 beats per minute. This condition arises when the atria of the heart experience rapid electrical impulses that lead to an increased heart rate. Unlike atrial fibrillation, which presents with an irregular rhythm, atrial tachycardia maintains a consistent rhythm, making option B the correct choice. The regularity of the rhythm helps distinguish it from other types of tachycardia or arrhythmias, as it suggests a specific and organized electrical activity originating in the atria. Understanding this characteristic is crucial for accurate diagnosis and management in telemetry and cardiac care.