Coronary Artery Disease Flashcards
Coronary Heart Disease
caused by damage to the coronary arteries resulting in build-up of lipids and fibrous matter
Plaques
lipid (fat) build-up
Classification of CHD
Stable Angina- fixed plaque
Acute Coronary Syndrome
1. unstable angina - Unstable plaque
2. non-ST-segment elevation MI (NSTEMI) - partial occlusion
3. ST segment elevation MI (STEMI) - complete occlusion
Angina
Sudden pain beneath the sternum; may radiate to left shoulder, arm and jaw
Drug Therapy for Angina
Prevention - cholesterol-lowering and antiplatelet agents
Treatment of Pain- nitrates, beta-blockers, , CCBs, and ranolozaine
Types of Angina
(fixed plaque)
- Chronic Stable
- Variant (Prinzmetal’s)
- Unstable
Chronic Stable Angina
- most common, caused by partial occlusion
Triggered By- increase in physical activity, emotional excitement, large meals, cold exposure
Therapeutic Agents - organic nitrate, beta-blockers, calcium channel blockers, ranolazine
Variant Angina
aka prinzmetals, caused by vasospasm
-can occur at rest, while sleeping, normal activity
Therapeutic agents - calcium channel blockers, organic nitrates
Unstable Angina
Caused by vasospasm and plaque rupture
- can happen at rest, exertion
Therapeutic Options- organic nitrates, beta-blockers, oxygen, iv morphine
Anti-platelet therapy- aspirin, clopidogrel, tricagrelor, prasugrel
Nitrates
MOA: acts primarily on cells of vascular smooth muscle
Physiologic effect: vasodilation, greater effect on veins than arteries
ex. nitroglycerin (NTG)
Nitroglycerin
given in stable and variant angina
reduces venous return to the heart and reduces preload and relaxes spasms in ca’s helping to increase oxygen supply
- rapidly metabolized by the liver
- large first-pass effect
- short half-life
Adverse Effects- NTG
Headache
orthostatic hypotension
reflex tachycardia
Drug Interactions - NTG
(can't be given at the same time) anti-hypertensive agents Beta-Blockers Phosphodiesterase-5 (PDE5) Non-dihydrophyridine calcium channel blockers
Other Nitrates
Isosorbide dinitrate (IR) - 3x daily Isosorbide mononitrate (ER) - 2x daily *isomer to remember er*
Ranolazine
used to increase efficiency of heart beating; may be added to BB, CCBs, or nitrates