• AVNRT (atrioventricular nodal reentry tachycardia)
• AVRT (atrioventricular reentry tachycardia)
• AT (atrial tachycardia)

Hemodynamically unstable: 

• Adenosine 6 mg rapid IV push If no response in 1 minute, repeat with 12 mg rapid IV push
• Cardioversion:  If adenosine not effective, proceed with the immediate cardioversion 100J

Hemodynamically stable:  Valsalva maneuver, blowing syringe

• Adenosine if Valsalva maneuver not effective, adenosine 6 mg IV push followed by 12 mg if no response in 2 minutes
• Metoprolol: If adenosine not effective, give metoprolol 5 mg IV every 5 minutes max 3 doses 15 mg 
• Amiodarone if all of the above fail, give amiodarone bolus 150 mg over 10 minutes, then continue at 1 milligram/minute for 6 hours, followed by 0.5 mg minute for 18 hours

From Current hospital medicine 2023 by Dr. Amyl Rafiq MD