Question: what is the difference between sinus tachycardia and inappropriate sinus tachycardia?
Answer: Inappropriate sinus tachycardia may only be diagnosed when all other causes of sinus tachycardia have been ruled out. Patients with sinus tachycardia present with resting heart rate above 100 beats per minute. They also tend to have an excessive increase in heart rate during all sorts of physical activity.