Q. Myocardial Na+ channel blockade by lignocaine has the following characteristic: (Solved)
1. It blocks inactivated Na+ channels more than activated channels
2. It blocks activated Na+ channels more than inactivated channels
3. It delays rate of recovery of Na+ channels
4. It produces more prominent blockade of atrial than ventricular Na+ channels
- a. It blocks inactivated Na+ channels more than activated channels