The following is not true of quinidine:
A. It blocks myocardial Na+ channels primarily
in the open state
B. It has no effect on myocardial K+ channels
C. It produces frequency dependent blockade
of myocardial Na+ channels
D. It delays recovery of myocardial Na+ channels
A. It blocks myocardial Na+ channels primarily
in the open state
B. It has no effect on myocardial K+ channels
C. It produces frequency dependent blockade
of myocardial Na+ channels
D. It delays recovery of myocardial Na+ channels