Angina Flashcards
With Stable angina you want to
decrease oxygen demand
Variant angina you want to
increase o2 supply with vasodilation of coronary arteries
unstable angina you want to
- med emergency
- treat as MI until proven
Organic nitrates prototype
Nitroglycerin
Action of nitro
Causes vasodilation of vessels in stable angina decreasing oxygen demand
- increase oxygen supply in variant angina by relaxing coronary artery vasospasm
Forms of Nitro
- oral, sublingual, IV, buccal, patch
- short and long acting: isorbade dintrite and isosrobide mononitrite
Most common form of Nitro
- sublingual
- store in dark package
- dont pour in hand
- dont storei n bathroom
- peak plasma within 4 mins
Admin directions of nitro
sublinguual -> do not chew or swallow
- admin 1 SL tablet every 5 mins x3
- IF no relief after 1st dose, then call EMS
Education for organic nitrates
- Refrain from alcohol -> severe hypotension
- Transdermal patches-> rotate sites
Tolerance develops - drug-free periods at night
Common SE:
-Headache - Hypotension, orthostatic hypotension
- tachycardia
WEAR gloves for paste and transdermal administration
- wipe off skin before applying defib pads to skin
Nitro drug interaction
- life threatening hypotension and cardiovascular collapse interaction with viagra or other ED drugs
Beta Blockers for angina Action
- Reduces cardiac oxygen demand of heart by slowing HR and reducing contractility
- 1st line of tx for chronic stable angina
NSG consideration
- Check the pulse ( hold if <60 or if they have HF or angina then 50bpm)
- Check BP
- Diabetes: mask s/s of hypoglycemia
- Teach not to stop abruptly
- Avoid in asthma/ COPD (cardiac nonselective)
- Monitor for brady and AV block
Beta Blocker prototype is
metoprolol
Calcium channel Blockers Action
Cause arteriolar smooth muscle relaxation-> dec BP ( afterload) -> dec myocardial oxygen demand
- can cause vasospasm to increase oxygen delivery
CCB SE
hypotension and reflex Tachy