Which of the following is not characteristic of sinus tachycardia?
A)The R-R intervals and the P-P intervals are equal and constant.
B)The heart rate is between 100 and 150 beats per minute.
C)The PR interval is between 0.12 and 0.20 second.
D)The QRS duration is between 0.10 and 0.16 second.

Question

Quizplus · Accepted Answer

Sinus tachycardia is characterized by a heart rate between 100 and 150 beats per minute, with R-R and P-P intervals that are equal and constant, and a PR interval between 0.12 and 0.20 second. The QRS duration in sinus tachycardia, however, typically remains normal, which is less than 0.12 seconds, making option D incorrect as it suggests a longer QRS duration than what is characteristic of sinus tachycardia.

Which of the Following Is Not Characteristic of Sinus Tachycardia