Table 6: Treatment of Inappropriate Sinus Tachycardia Syndrome According to the Heart Rhythm Society.

Recommendation	CoR	LoE
Reversible causes of sinus tachycardia should be sought and treated.	I	E
Ivabradine can be useful in treating patients with IST.	IIa	B-R
Sinus node modification, surgical ablation and sympathetic denervation are not recommended as a part of routine care of patients with IST.	III	E

CoR = class of recommendation; IST = inappropriate sinus tachycardia; LoE = level of evidence.[1]