Beta Blockers, Antianginals, Ace Inhibitors, ARBs Flashcards
What are selective beta blockers vs non-selective
Cardio selective only block beta 1 receptors in heart, while non-selective block both beta 1 and 2
What is the difference between beta 1 receptors and beta 2 receptors
Beta 1 receptors are found in the heart (and kidneys) so their blockage causes cardiovascular effects, while beta 2 receptors are found in the lungs so their blockage causes bronchial effects as well as inhibition of glycogenolysis
Is propranolol selective or nonselective
Non selective
Propranolol indications
Angina, Hypertension, Cardiac Dysrhythmias, MI, Migraine Prophylaxis, Stage fright, Hypothyroidism, pheochromocytoma, glaucoma
What VS are important to observe before administering Propranolol
BP and HR
What are the 3 objectives of antianginal therapy
- Minimize the frequency and duration of attacks and intensity of pain
- Improve patient’s functional capacity with as few side effects as possible
- Prevent or delay MI, decrease morbidity and mortality
What are the 3 types of angina
- Chronic Stable Angina: chronically narrowed arteries due to atherosclerosis, causes pain with increased demand
- Variant Angina: due to vasospasm, heart doesn’t get enough blood and causes pain
- unstable angina: like chronic angina, but clot causes total block of artery, leading to medical emergency
Which preparations of nitroglycerin are and aren’t affected by the the first pass effect
- first pass: oral
- No first pass: sublingual, translingual,transdermal, topical, IV
Which preparations of Nitroglycerin are rapid and brief, vs slow and long
Rapid and Brief: Sublingual, translingual, and IV
Slow and Long: Oral, transdermal, topical
What are the indications of rapid forms of nitroglycerin vs slower and longer lasting
Rapid: terminate ongoing angina, acute treatment, HF with MI or perioperative HTN
Slow: prophylaxis, long term protection
What is an important nursing consideration for antianginals regarding vitals
Decreases BP so ensure vitals are taken beforehand and mobilize patient slowly
What are the side effects of antianginals
Headache, orthostatic Hypotension, reflexive tachycardia, contact dermatitis, Tolerance
What is reflexive tachycardia caused by nitroglycerin
Because of the rapid vasodilation. BP is lowered by decreasing venous return and dilating arteries. This can activate baroreceptor reflex, causing sympathetic stimulation of the heart resulting in increased HR and contractile force (cardiac demand) which negates the purpose of the nitro in the first place.
What 3 things trigger the RAAS cycle
Low Na, Low water, High K+
Ace Inhibitors MOA
Inhibit the conversion of A1->A2 in the lungs by ACE