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Electrical instability in a healthy 50 year old. How to manage?

Dr. Smith's ECG Blog

That said there were no clinical symptoms or ECG findings suggestive of ongoing ischemia. CT coronary angiogram showed a hypoplastic RCA and dominant LCx. You have given IV MgSO4 a fast acting -blocker and IV amiodarone bolus and infusion. Troponin T was negative on admission and on repeat blood draw. No PVCs are seen.