Management of Sinus Tachycardia

Initial Assessment and Stabilization

Evaluate for signs of hemodynamic instability including acute altered mental status, ischemic chest discomfort, acute heart failure, hypotension, or shock, as recommended by the American Heart Association 1
Assess oxygenation status and provide supplementary oxygen if inadequate, as hypoxemia is a common cause of tachycardia, according to the American Heart Association 1
Obtain a 12-lead ECG to confirm the rhythm is sinus tachycardia rather than another supraventricular tachycardia, as suggested by the American College of Cardiology 2

Proceed to immediate synchronized cardioversion if the patient demonstrates rate-related cardiovascular compromise, as recommended by the American Heart Association 1
Use appropriate sedation if the patient is conscious and time permits, according to the American Heart Association 1
Initial biphasic energy dose for cardioversion should be 120-200 J, as suggested by the American Heart Association 1
Intravenous beta blockers, diltiazem, or verapamil are first-line treatments for acute management, as recommended by the American College of Cardiology [3] [4]

Investigate common physiologic stimuli that can cause sinus tachycardia, including fever, infection, hypovolemia, anemia, pain, anxiety, or emotional stress, hyperthyroidism, and recreational drugs, as suggested by the American College of Cardiology 5
Treat the underlying cause while simultaneously managing the tachycardia, as recommended by the American College of Cardiology [5] [1]
Pulmonary embolism should be considered as a potential underlying cause, according to the American Heart Association 1

A heart rate of 200 BPM is at the upper limit of physiologic sinus tachycardia and may indicate a pathologic process, as suggested by the American College of Cardiology 5
With ventricular rates >150 bpm, the tachycardia is more likely to be the cause rather than the result of instability, according to the American Heart Association 1
Sinus tachycardia may be compensatory; normalizing heart rate without addressing the underlying cause can be detrimental in compensatory tachycardias, as recommended by the American Heart Association 1

After acute rate control is achieved, transition to oral medications for ongoing management if needed, as suggested by the American College of Cardiology 4
Consider referral to an electrophysiologist if episodes are recurrent or if inappropriate sinus tachycardia is suspected, according to the American College of Cardiology 2

Avoid rate-controlling medications in patients with accessory pathways (WPW syndrome) as this can accelerate conduction through the accessory pathway, as recommended by the American College of Cardiology 6