CAD and Antianginals
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Two main causes of angina
Patients with history of angina should have _____ and know how to use it.
If after first dose of no relief call EMS
Patients with symptoms suggestive of CAD should be_______?
referred to a cardiologist.
Three major classes of anti angina drugs
- Nitrates -long and short acting
MOA of nitrates
relax vascular smooth muscle. They cause dilation of the peripheral arteries and veins as well as coronary arteries. Reduction in preload and increased blood flow and oxygen supply to the myocardium.
Nitrates are one of the first medications used for angina. They are used to .....
Stop an acute attack, prevent attacks, and for chronic treatment.
SL nitro and acute attack
- 0.3-0.4 SL at 3-5 minute intervals for 3 doses.
- IF UNIMPROVED OR WORSE AFTER 5 MINUTES, CALL EMS. (IT SHOULD BE EFFECTIVE IN 1-2 MINUTES)
How soon for thrombolytic therapy in MI
1-3 hours of onset
Long acting nitrates
Isosoride, nitro patch
maintain vasodilation continuously decreasing the workload of the heart and maintaining blood flow to the heart.
- Start Low and Go Slow
- Take on empty stomach
- Short half life may have to take multiple doses per day.
- Tolerance can develop in as few as 7-10 days of ongoing treatment.
- To prevent this need 10-12 hour nitrate-free intervals every day.
Most common adverse effect of nitrates
Teach patients to avoid use of other vasodilators while taking nitrates because it can cause severe _____?
While pt taking nitrates have them
keep diary of prn use
Labs with nitrates
cardiac enzymes and electrolytes at least every three months.
Most common interaction with nitrates
- Can cause severe hypotension and cardiovascular collapse
Geriatrics and nitrates
- are at greater risk for syncope with nitrates
- have patient sit or lie down before administering drug.
- usually need lower dose
Nitrate pregnancy category
- MOA unknown
- minimal effects on HR and BP
- improves exercise duration and angina symptoms when added to patient therapy already on antianginals
Notify healthcare provider if taking nitrates and have these symptoms
- blurred vision
- persistent headache
- dry mouth
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