A patient presents with a cardiac arrythmia. Describe (in phases), how the cells in their sinoatrial node should normally behave to prevent the arrythmia

Anurse is preparing to administer lidocaine via continuous iv infusion at 4 mg/min. available is lidocaine 2 g dextrose 5% in water 500 ml. the nurse should set the iv pump to deliver how many ml/hr? (round the answer to the nearest whole number. use a leading zero if applicable. do not use a trailing zero.)