Which two classes of antidysrhythmic drugs have nearly identical cardiac effects?
a. Beta blockers and calcium channel blockers
b. Beta blockers and potassium channel blockers
c. Calcium channel blockers and sodium channel blockers
d. Sodium channel blockers and potassium channel blockers
ANS: A
Calcium channel blockade has the same impact on cardiac action potentials as does beta blockade, so these agents have nearly identical effects on cardiac function; that is, they reduce automaticity in the SA node, delay conduction through the AV node, and reduce myocardial contractility. Potassium channel blockers act by delaying repolarization of fast potentials. Sodium channel blockers block sodium channels to slow impulse conduction in the atria, ventricles, and His-Purkinje system.
You might also like to view...
The nurse recommends that a patient have animal-assisted therapy sessions (AAT) because this therapy has been found to have what effect(s)? (Select all that apply.)
a. Improvement in mood b. Decrease in blood pressure c. Decrease in blood sugar d. Reduction of allergies e. Increase in socialization skills
Decreasing visual acuity is a sign of _________ __________
Fill in the blank(s) with correct word
An adolescent is brought to the clinic by her mother because of abnormal uterine bleeding. The nurse should understand that the most likely cause of this dysfunctional bleeding pattern is what?
A) Lack of ovulation B) Chronic vaginitis C) A sexually transmitted infection D) Ectopic pregnancy
When planning activities of daily living (ADLs) for the older adult patient, the nurse would be correct in providing:
1. frequent rest periods between activities. 2. a variety of planned activities throughout the day. 3. frequent variation of daily schedule. 4. complete personal care.