Unstable/sustained torsades→ defibrilation (unsynchronized)
Stable
Treat underlying etiology
Increase HR >80 (isoproterenol or overdrive pacing)
Magnesium sulfate IV
Consider lidocaine, transvenous pacing
Treat underlying etiology
Increase HR >80 (isoproterenol or overdrive pacing)
Magnesium sulfate IV
Consider lidocaine, transvenous pacing
Unstable/sustained torsades→ defibrilation (unsynchronized)
Stable
Slow HR (beta-blockers)
May consider magnesium sulfate
Slow HR (beta-blockers)
May consider magnesium sulfate
QT prolongation
Cardiovascular-mediated syncope
T wave changes
Dysrhythmias:
ST segment elevation
WPW 
ST segment depression
Long QT Syndrome/QT prolongation