Chapter 29: Ischemic Heart Disease Flashcards
Another name for stable angina
Stable ischemic heart disease (SIHD)
SIHD is associated with
predictable chest pain
often brought on by exertion or emotional stress
Which type of angina is relieved by rest or nitroglycerin
Stable angina
or
SIHD
Unstable angina is a type of
acute coronary syndrome (ACS)
What is Prinzmetal’s angina
When chest pain is caused by vasospasm of the coronary arteries.
Can occur at rest & often caused by illicit drug use, particularly cocaine
Chest pain occurs when there is an imbalance between _____ and _____
myocardial oxygen demand (workload)
supply (blood flow)
In stable ischemic heart disease (SIHD), myocardial O2 supply is often ↓ d/t _____ within the inner walls of the coronary arteries
plaque build-up (atherosclerosis)
What is performed to assess the likelihood of CAD and diagnose SIHD
Cardiac stress test
How is a cardiac stress test performed
Exercise on treadmill
or
stationary bike or IV meds
Which IV meds can be used in a cardiac stress test
dipyriadmole
adenosine (Adenoscan)
regadenoson (Lexiscan) or dobutamine
What is the recommended antiplatelet drug for AIHD
Aspirin
(clopidogrel can be used when there is an allergy or other CI to aspirin)
Antianginal treatment ____ myocardial oxygen demand or ____ myocardial oxygen supply
decreases
increases
Which drug class is first line for angina
Beta-blockers
What should be used as second line for angina or when additional symptomatic relief is needed
CCBs or long-acting nitrates
Which medication is recommended for immediate relief of angina in all pts
Nitroglycerin, as a SL tab
powder
translingual spray
Patients with SIHD should be treated with a ___-intensity statin
high
What is the treatment approach for stable ischemic heart disease
A- antiplatelet and antianginal drugs (BB, CCBs, and nitrates)
B- BP and BB
C - Cholesterol (statins) and cigarettes (cessation)
D- Diet and diabetes
E - exercise & education
Aspirin MOA
irreversibly inhibits COX-1 and COX-2 enzymes
which results in decreased prostaglandin and thromboxane A2 production (TXA2)
Clopidogrel MOA
irreversibly inhibits P2Y12 ADP-mediated platelet activation and aggregation
ASA dosing
75-162 mg daily
Clopidogrel dosing
75 mg daily
Aspirin CI
NSAID or salicylic acid allergy
Children and teenagers with vital infection d/t risk of Reye’s syndrome
Aspirin warnings
Bleeding
tinnitus (salicylate OD)
Aspirin SE
dyspepsia (indigestion)
heartburn
bleeding
How long is aspirin used for in SIHD
indefinitely
Which formulation of ASA is preferred in ACS
non-enteric coated
chewable ASA
What should a patient do in ACS if only EC aspirin is available
chew it (325 mg tab)
Which two formulations of ASA should not be used when rapid onset is needed
ER capsule (Durlaza) DR tablet (Yosprala)
What can be used to protect the gut with chronic NSAID use
PPIs
(consider risks - decreased bone density and increased infection risk)
Which CYP enzyme converts clopidogrel to its active metabolite
2C19
Clopidogrel CI
active serious bleeding
Clopidogrel should be stopped 5 days prior to:
elective surgery
Clopidogrel should not be used with which 2 drugs
omeprazole
esomeprazole
Clopidogrel can cause
thombotic thrombocytopenic purpura (TTP)
When is clopidogrel used in SIHD
when there is a CI to aspirin
Dual antiplatelet therapy (DAPT) with ASA and clopidogrel is reserved for which patients (& what is the duration)
- bare metal stent placement (DAPT for at least 1 month)
- Drug-eluting stent (DAPT for at least 6 months)
- post-CABG (DAPT for 12 months)
Aspirin is dosed at ___ mg daily in Dual antiplatelet therapy (DAPT) regimens and is continued indefinitely at 75-162 mg daily after this course of DAPT therapy
81 mg
Mechanism of clinical benefit of BB in SIHD
decreases HR
decreases contractility
decreases LV wall tension
Which drug class is preferred for Prinzmetal’s angina
CCBs
Mechanism of clinical benefit of CCBs in SIHD (non-DHP and DHP)
non-DHPs: decrease HR and contractility
DHPs: decrease SVR (afterload)
Mechanism of clinical benefit of nitrates in SIHD
Decrease preload
(free radical NO produces vasodilation of veins more than arteries)
BB should be titrated ti resting HR of
55-60 BPM
Which types of BB are preferred in SIHD
BB without ISA
(metoprolol, atenolol)
BB should be avoided in
Prinzmetal’s angina
Which CCBs should be avoided in SIHD
short-acting DHPs (like nifedipine IR)
When are DHP CCBs preferred in SIHD
when they are used in combination with BB (d/t risk of excessive bradycardia when non-DHPs are used with BB)
When are long-acting nitrates used in SIHD
when BB are CI
or
as add-on therapy for treatment of symptoms
Ranolazine CI
strong 3A4 inhibitors and inducers
Ranolazine warning
QT prolongation
Nitroglycerin formulas all come in which dose
0.4 mg
Which meds are long-acting nitrates
Nitroglycerin ointment 2% (Nitro-BID)
Isosorbide mononitrate IR/ER tablet
Nitrate CI
Do not use with PDE5 inhibitors
Nitrate warnings
Hypotension
HA
tachyphylaxis (↓ effectiveness/tolerance with LA products)
Nitrate SE
HA
flushing
syncope
How long after opening nitroglycerin SL tab vial should the bottle be discarded
6 months
Long-acting nitrates require a __-__ hour nitrate-free interval to decrease tolerance
10-12
Nitroglycerin patch should be worn on for __-__ hours & rotate sites
12-14
Nitroglycerin ointment is dosed how many times per day and how many hours apart
BID
6 hours apart
Isosorbide mononitrate IR is dosed BID, __ hours apart
7
Isosorbide dinitrate in combination with ___ is the preferred formulation for systolic HF
hydralazine
When using NTG SL tabs, powder or spray, when should 911 be called
if chest pain persists after the first dose
Take ___ additional dose(s) at __ minute intervals of NTG while waiting for an ambulance to arrive
2
5
Do NOT take more than __ doses of NTG within 15 min
3
What is not a sign that NTG is working well
Slight burning or tingling sensation
Counseling for NTG TL spray
Do not shake
Spray onto or under the tongue
Do not inhale the spray
What is the preferred application site for NTG patches
Chest
Counseling for NTG ointment
Measure the dose of ointment with the dose measuring applicator
Can stain clothing