However, ventricular tachycardia and ventricular fibrillation remain the most important causes of sudden death following spontaneous restoration of antegrade flow. Prior to the modern practice of percutaneous coronary intervention for acute coronary syndrome, pharmacologic thrombolysis was more common and accelerated idioventricular rhythms were used as a sign of successful reperfusion. It is considered a benign arrhythmia especially in the setting of STEMI(where it is conventionally thought to be an indicator of reperfusion) that does not require intervention, though atrioventricular dyssynchrony can cause hemodynamic instability, which can be treated through overdrive pacing or atropine. Diagnosis
Differential diagnosis
AIVR appears similar to ventricular tachycardia with wide QRS complexes (QRS >0.12s) and a regular rhythm. It can most easily be distinguished from VT in that the rate is less than 120 and usually less than 100 bpm. There may or may not be AV dissociation depending on whether it is due to ventricular escape or AV block. References


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The final criteria that must be met is that the mood episodes cause clinically significant distress or impairment in social, occupational, or other important areas of functioning (from the depressive symptoms or the unpredictability of cycling between periods of depression and hypomania).A hypomanic episode is established if a patients symptoms last for most of the day each day for at least four days. Furthermore, three or more of the following symptoms must be present: Inflated sense of self-esteem or grandiose thoughts, feeling well rested despite getting low amounts of sleep (3 hours), talkativeness, racing thoughts, distractibility, and increase in goal-directed activity or psychomotor agitation, or excessive involvement in activities with high risk of painful consequences. Per DSM-5 criteria, a major depressive episode consists of the presence of a depressed mood or loss of interest/pleasure in activities (anhedonia). In addition to the former symptoms, five out of the nine following symptoms must occur for more than two weeks (to the extent in which it impairs functioning): weight loss/gain, insomnia or hypersomnia, psychomotor agitation or retardation, fatigue, feelings of worthlessness/inappropriate guilt, decreased concentration, or thoughts of death/suicide.Specifiers:

With current or most recent episode hypomanic or depressed
With partial remission or full remission
With mild, moderate, or severe severity
With anxious distress
With catatonic features
With mood congruent psychotic features
With peripartum onset
With seasonal pattern (applies only to the pattern of major depressive episodes)
With rapid cycling.