At what rate does a patient experience sinus tachycardia?

Sinus tachycardia is characterized by an elevated heart rate that occurs as a physiological response to various factors such as stress, fever, anxiety, or exercise. The defining characteristic of sinus tachycardia is that the heart rate is above the normal resting range for adults.

A healthy adult heart typically beats at a rate of between 60 to 100 beats per minute (bpm) while at rest. When the heart rate exceeds 100 bpm, it is categorized as tachycardia. The specific range of 100 to 150 bpm falls under the definition of sinus tachycardia, as this reflects a heart rate that is elevated, yet still controlled by the sinus node, which is the natural pacemaker of the heart.

To summarize, the correct answer reflects the heart rate associated with sinus tachycardia, distinguishing it clearly from other types of tachycardias that occur at higher rates.