Depends on cause of tachycardia:
Home for pain, fever, or anxiety resolving with appropriate treatment
Certain withdrawal or intoxication syndromes may require ED observation or admission
ICU for severe sepsis
OR for life-threatening hemorrhage
Home for pain, fever, or anxiety resolving with appropriate treatment
Certain withdrawal or intoxication syndromes may require ED observation or admission
ICU for severe sepsis
OR for life-threatening hemorrhage
Sinus tachycardia
Regular
Wide-complex tachycardia
AV Node Independent
Junctional tachycardia
Narrow-complex tachycardia
Atrial tachycardia 
Ventricular tachycardia