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If you don't know what the dysrhythmia is, then try procainamide. The fact that the 50yo man in today's case has known coronary disease ( including exercise-induced angina over the previous 3 months ) — means that even before looking at his initial ECG — statistical odds that his regular WCT rhythm will be VT are at least 90%.
Flecainide : This is a potentially dangerous Na channel blocker which can cause ventricular dysrhythmias including ventricular fibrillation. Before continuing flecainide, he had me get on a treadmill at full dose and at full exercise (18 minutes) and measured the QRS to be certain that the QRS did not lengthen at all. Coincidence?).
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