Final Exam Flashcards - Angina
Angina
- A symptom of ischemic heart disease
- In angina there is an imbalance between blood supplied to the heart and the need for blood and oxygen
Symptoms of Angina
-Chest sensation expressed as pressure, squeezing, burning, fullness, etc.
symptoms are due to coronary arteries being damaged, blocked or narrowed
Types of Angina
- Stable
- Unstable
- Variant
Stable Angina
- Blood and O2 supply are sufficient if there are no demands placed on the heart
- Symptoms only occur with physical exertion
- Symptoms are relieved by rest and/or medication
Unstable Angina
- Symptoms may occur at rest, without physical exertion
- Symptoms are NOT relieved by rest or medication
Variant Angina
- Symptoms are caused by vasospasm of coronary arteries
- symptoms occur at rest, at night, or early morning
- Symptoms are relieved by medications
Nitrates
- All have “nitro” or “nitra” in their names
- Dilate blood vessels
- Most are prodrugs
Nitrate Dosage Forms
Some dosage systems are designed to deliver nitroglycerin quickly and are used to treat acute symptoms (ex. sublingual tablets, lingual spray, parenteral, oral tabs)
-Some are meant do deliver nitroglycerin over an extended period of time and are intended to prevent angina symptoms (ex. Transdermal patches, extended release tablets, ointment)
Nitroglycerin For Acute Treatment
- Designed for Quick Delivery
- Schedule II
- May use 1 dose SL every 5 minutes for acute angina
- patient should be seated
- Maximum 3 doses in 15 minutes
Isosorbide (-Nitrate)
- Isosorbide dinitrate is formulated for acute use (SL 5 mg tabs), and prevention (10 and 30 mg tabs)
- Isosorbide mononitrate is the long acting metabolite of ISDN. Used for prevention only
Nitroglycerin Patches
- Transdermal delivery avoids first pass metabolism
- Patch is applied for 12-14 hours, then removed for 10-12 hours to avoid tolerance
Nitrate ADR’s
- Hypotension
- Facial flushing
- Dizziness
- Headache
- N/V
- Weakness
- Fatigue
Nitrate Tech Note!
- Patients who use nitrates can develop tolerance
- Patient must be nitrate free for at least 10-12 hours per day to minimize risk of tolerance
B-Adrenergic Blockers For Angina
- Administered to reduce hearts demand for oxygen
- Decrease heart rate
- Decrease frequency and severity of stable angina (Used for prevention)
CCB’s for Angina
-Used to treat variant and stable angina