A 62-year-old man is being managed in the intensive care unit following a large anterior wall MI. He has been appropriately managed with oxygen, aspirin, nitrates, and b-adrenergic receptor blockers but has developed recur- rent episodes of ventricular tachycardia. During these episodes he remains conscious but feels dizzy, and he becomes diaphoretic and hypotensive. He is given an IV bolus of lidocaine and started on an IV lidocaine infusion.
1) To what class of antiarrhythmic does lidocaine belong?
2) What is lidocaine’s mechanism of action?