Ca channel Blockers

Question 1

What are the names of Ca Channel Blockers

Answer 1

“Pine”- Amlodopine - Felodopine- Nicardapine - Nifedipine - Verapamil - Diltiazem

Question 2

What is the Action of Ca Channel Blockers

Answer 2

Blocks Ca channels in blood Vessels leads to vaso dilation in the peripheral arterioles of (vascular smooth muscle and arteries and arterioles of the heart

Question 3

Nifidipine acts primarly on

Answer 3

arterioles. (The veins are not affected) blocking of Ca channels in blood vessels leads to vasodilation of vascular smooth muscle

Question 4

Verapamil, diltiazem acts primarily on

Answer 4

blocking of Ca - leads to vasodilation of peripheral arterioles and arteries these medications act on arterioles and the heart … viens are not affected , Blocks channels in the myocardium SA node, and Av node leads to a decreased force of contraction decreased heart rate and slowing of the rate of conduction through the AV node

Question 5

What are the uses of Nifidipine

Answer 5

Hypertension, Angina pectoris, Stops uterine contractions

Question 6

what are the complications of Nifidipine

Answer 6

Reflex tachycardia, Acute Toxicity, orthostaic hypotension, and peripheral edema a diuretic can be prescribed to control edema

Question 7

Acute toxicity with Nifidipine

Answer 7

with excessive doses the heart and the blood vessels are affected … monitor vital signs and EKG

Question 8

Reflex tachycardia with Nifidipine

Answer 8

Monitor for increased heart rate , administer a beta blocker (metoproplol) to counter act the tachycardia

Question 9

Orthostatic hypotension and peripheral edema with Nifidipine

Answer 9

Monitor blood pressure and daily weights observe for swelling in the lower extremities watch for postural hypotension administer a diuretic to control edema

Question 10

how should Nifidepine be pushed Iv

Answer 10

Slow too fast causes sudden drop in BP.

Question 11

What are the complications of Verapamil, Diltiazem

Answer 11

orthostatic hypotension, peripheral edema, constipation (primarily in verapamil) ,suppression of cardiac function dysrhtmias= qrs complex and qt interval and acute toxicity

Question 12

How would you know of dysrhythmias in Verapamil and Diltiazem

Answer 12

QRS complex is widened and QT interval is prolonged monitor vital signs and EKG

Question 13

In an acute toxicity

Answer 13

monitor vital signs and ECG gastric lavage and cathartic if indicated administer : norepinephrine calcium isoproterenol,lidocaine and IV fluids have equipment for cardioversion and cardiac pacer available

Question 14

Nifidipine contraindications :

Answer 14

Pt in cardiogenic shock , acute MI , unstable angina, aortic stenosis, hypotension, sick sinus symdrome

Question 15

acute toxicity in verapamil , diltiazem

Answer 15

results in hypotension bradycardia AV block and ventricular dysrhythmias. thats why verapamil is also contraindicated in pts who hypotension, and heart block

Question 16

Nifidipine interactions

Answer 16

Beta blockers such as Metoprolol are used to decrease reflex tachycardia

Question 17

Cimetidine rantidine and grapefruit juice can lead to

Answer 17

Toxicity ( monitor for indications of toxicity : decrease in BP increase in heart rate, and flushing

Question 18

Verapamil , Diltiazem can increase what levels

Answer 18

digoxin levels increasing the risk for digoxin toxicity digoxin can cause an additive effect and intensify AV conduction suppression

Question 19

nursing administration IV verapamil - administer injections

Answer 19

injections slowly over a period of 2-3 min

Question 20

Do not crush or chew sustained release

Answer 20

its released too fast sever rapid effects

Question 21

Cardiac GTT

Answer 21

EKG strip before and after med to check for dysrhtmias pt is not to be walking around with a cardiac gtt