What is your approach to inpatient work-up for suspected long QT syndrome in a young adult with otherwise normal labs and no medications causing prolonged QTc?   

I would emphasize the basics when I approach this clinical scenario.  The first step is to carefully analyze the ECG that raised the question. Though measuring the QT interval should be easy, we all appreciate that this is not always the case. Carefully examine the index ECG, look at all the l...