What characteristic is typical of atrial tachycardia?

• A. Irregular rhythm
• B. Rate of 60-100 bpm
• C. Rate of 150-250 bpm
• D. Normal P waves

Answer: (C)

Atrial tachycardia is characterized by a rapid heart rate, specifically within the range of 150 to 250 beats per minute. This elevated rate occurs due to the abnormal electrical activity in the atria, leading to a faster-than-normal contraction of the heart.

While the other choices mention characteristics related to rhythm and rate that may not be typical for atrial tachycardia, the defining aspect of this condition is indeed the high heart rate. The rhythm is usually regular, as opposed to being irregular, and the P waves in atrial tachycardia may appear differently compared to normal sinus rhythm; they could be present but possibly with altered morphology. The band of 60-100 bpm corresponds more closely to a normal sinus rhythm rather than tachycardia. Thus, identifying the rapid heart rate accurately characterizes atrial tachycardia and leads to appropriate clinical management.