PHARM - Cardiac, Respiratory, Endocrine Flashcards
Types of heart drugs (6)
- Beta blockers
- ACE inhibitors/ARB inhibitors
- Nitrates/vasodilators
- Calcium channel blockers
- Anti-arrhythmics
- Anti-coagulants/anti-platelets
Common heart conditions (12)
- cardiomyopathy
- cholesterol
- AAA
- Atrial fibrillation
- Arrhythmias
- cardiac arrest
- STEMI
- angina
- HTN
- endocarditis
- pericarditis
- non-ischemic chest pain - can be related to any of the above conditions (primarily endocarditis and pericarditis; and breathing disorders like pneumonia)
Anti-arrhythmic drugs
- Class 2 Beta blockers that block impulses that cause irregular heart beats
- interferes with hormonal influences such as adrenaline on the heart cells
- helps reduce BP and rate
- Suppresses abnormal rhythms of the heart (beating too quickly or slowly)
Conditions warranting use of anti-arrhythmics
- Atrial fibrillation
- Atrial flutter
- SVT
- Irregulary bradycardia
- uncontrolled tachycardia
Drug names: anti-arrhythmics
- amiodarone
- procainamide
- metoprolol - does not fall into anti-arrhythmics family but is a BETA BLOCKER with anti-arrhythmic qualities
- Verapamil
Adverse reactions and side effects of anti-arrhythmics
- arrhythmia worsens
- slower heart rates can sometimes be dangerous (may put your heart into asystole before SA node starts firing again to put heart back into NSR)
- chest pains
- diplopia
- edema to lower extremities - backflow and improper circulation
Beta-blockers
- known to block Beta -1 adrenergic ?blocking agents (did she mean receptors)
- help reduce BP
- work by blocking effects of hormone epinephrine and norepinephrine
- heart beats more slowly and with less force thereby reducing BP
- some affect HR while others affect HR and blood vessels (depends on your comorbidities and hx)
- Use of BB can also result in bronchoconstriction in patients with asthma
- this is because although it works on beta-1 receptors it may also work on some other beta cell (such as beta-2 leading to bronchoconstriction and potentially asthma attacks)
- varied in effects (mild to significant BBs)
Family name for Beta-blockers
-lol or -olol
Effect of beta-blockers (i.e. chronotropic, ionotropic, etc.)
-ve chronotropic, -ve ionotropic
Beta-blockers usually keep HR in what range
50-60 BPM range; never over 80-100 BPM
Describe the physiological changes that occur with use of beta blockers.
- beta blockers bind to beta-1 receptors which do not allow norepinephrine and epineprhine to bind to receptors (affects receptors in the heart and blood vessels)
- arteries are dilated which lowers blood pressure
- beta blockers also slow SA node whcih allows the left ventricle to fill completely, lowering heart workload
Conditions for Beta blockers
- chest pain (from a variety of cardiac conditions)
- HTN
- Post STEMI
- Cardiomyopathy
- Arrhythmias such as a-fib
The LOLs
- Acebutolol
- Atenolol
- Bisoprolol
- Metoprolol
- Propanolol
- Nadolol
Adverse Reactions and Side Effects of Beta-blockers
- dizziness, weakness
- drowsiness or fatigue
- cold hands or feet - can result in gangrene, with increased risk in those with some sort of peripheral vascular disease)
- dry mouth, skin and eyes
- headache
- upset stomach
- diarrhea or constipation (depending on diet)
You come on scene to a patient whom is feeling faint. His medications include: atenolol, bisoprolol, and lasix. He most likely has a hx of?
a) MI
b) HTN
c) CA (cancer)
d) enlarged prostate
can be a) or b)
+ this patient is on lasix which is a diuretic for reducing high BP or getting water out of the heart after surgeries/heart attack
ACE Inhibitors
- aka Angiotensin Converting Enzyme Inhibitors
- stop the body’s ability to convert angiotensin I to angiotensin II (working at the lungs)
- works by binding with smooth musles of arteries, allowing arteries to relax and dilate, increasing the amount of blood your heart pumps - raises blood flow and return
- helps to lower heart’s work load and lowers blood pressure
- also treats heart failure - because it works on our kidneys
Angiotensin Converting Enzyme (ACE)
- central component of the renin angiotensin system which controls BP by regulating volume of fluids in the body
- Angiotensinogen released from liver, renin that is released from kidney acts on angiotensinogen to convert it to angiotensin I
- converts Angiotensin I to active vasoconstrictor angiotensin 2 at the lungs
- primarily works on the kidneys to increase sodium and water retention, and everyone has ACE!
Common adverse effect of ACE inhibitors
This adverse effect would cause which population to not be a candidate for ACE inhibitors?
dry tickly cough
this is an adverse effect rather than a side effect because if the coughing can’t be stopped then this can lead to COPD exacerbations which are equivalent to significant asthma attacks - therefore those with COPD or emphysema would not be a candidate for ACE inhibitors
Family name for ACE inhibitors
-pril
Conditions for ACE inhibitors
- heart failure
- HTN
- prevention of kidney damage from DM
- prevention of continuous damage after MI
The PRIL’s
- Captopril
- Enalapril
- Fosinopril
- Lisinopril
- Quinapril
- Ramipril
- these can be marketed (aka have brand names)
Adverse Reactions and Side Effects of Prils
- dry cough
- hyperkalemia
- fatigue
- dizziness
- headaches
- loss of taste
Angiotensin Receptor Blocker (ARB)
- Angiotensin 2 receptor blocker helps lower BP
- works the same as ACE inhibitors but without the “dry tickly cough”
- blood vessels dilate and BP is reduced
Family name for Angiotensin Receptor Blocker (ARB)
Sartan
Mechanism of Action of Angiotensin Receptor Blockers (ARBs)
ARBs block action of angiotensin II from binding to angiotensin II Type 1 (AT1) receptor but not type 2 receptors (AT2); allows angiotensin II to bind to AT2 triggering vasodilation
What do both ACE inhibitors and ARBs have in common?
They both work on the renin-angiotensin-aldosterone-system (RAAS), lowering BP
Nitrates/vasodilators
- helps dilate arteries to the heart
- increases oxygen-rich blood flow to the heart
- helps relieve angina symptoms or chest pain
- also dilates veins in body so they can hold more blood, thus reducing the workload on your heart
- however, note that with vasodilation you can flood it to the point where all the workload is taken off of the heart which can cause hypovolemic or cardiogenic shock
- can be used for chronic or emergency problems (meds like nitro works almost instantaneously so can be used in emergencies)
- pill, sublingual, tablet
Difference between nitrates and vasodilators
Nitrates - are meds derived from nitroglycerin
Vasodilators are not derived from nitroglycerin
Conditions for Nitrates/vasodilators
- HF - when used ith other cardiac medications (such as ACE inhibitors, ARBs, and BBs)
- angina pains
- HTN
Nitrate medications
- also called anti-anginal medications
- Common meds:
- Nitroglycerin
- Diltiazem
- Felodipine
- Nifedipine and Verapamil
- note: verapamil - has qualities of vasodilation AND anti-arrhythmics (ONLY used in emergency settings)
Adverse reactions and side effects of nitrates
- headache - due to vasodilation in brain as well
- dizziness, lightheadedness (dropping of BP)
- nausea
- flushing - because systemic vasodilation
- burning or tingling under the tongue for SL (SL can also cause flushed face)
- circular patches on skin (ex. nitro patches may localize the dilation)
Calcium Channel Blockers (CCB)
- prevent calcium from entering the cells of the heart and blood vessel walls (CCB binds to calcium channel to block it)
- CCB reduces electrical conduction within the heart and decreased force of contraction of muscle cells
- dilates arteries, reuslts in lower BP
- slows HR (to allow left ventricle to fill completely, and lowers heart workload)
- helps control irregular heart beat
Family name for Calcium Channel Blockers (CCBs)
dipine
Effect of calcium channel blockers (i.e. ionotropic, chronotropic, etc.)
-ve dromotropic, -ve ionotropic, -ve chronotropic
Conditions for CCBs
- treating HTN
- tx for rapid heart rhythms as it decreases excitability for heart muscles (SVT, uncontrolled a-fib, atrial flutter)
Medication names for CCBs
- Amlodipine
- Felodipine
- Isradipine
- Nicardipine
- Nifedipine
- Verapamil
- Diltiazem - vasodilator but also has characteristics of CCBs
Adverse Reactions and side effects of CCBs
- headache
- constipation
- rash
- nausea
- flushing - sign of BP getting too low at certain sites
- edema - pooling caused by decreased BP
- drowsiness
- low BP - may lead to hypovolemic shock
overdosing on CCB medications can be lethal, causing hypotension, shock, and body system collapse
Anti-coagulants and Anti-platelets
- “blood thinners”
- used for heart diseases (ex. a- fib) and patients with MI and pacemakers
- anti-coagulants: slow down body’s processes of making clots
- anti-platelets: prevent blood cells from clumping together to form a clot
- without these drugs, clots can block circulation and lead to heart attacks/CVAs
- both work to prevent clots but work in different ways
A patient on ketoralac/toradol cannot be on what other medication (i.e contraindication)?
- cannot be on an anti-platelet - taken in combination, they both have anti-platelet properties which would increase risk/severity of bleeding
- can be on anti-coagulant though
Patients who have fallen and hit their head, who are also on blood thinners can be at risk for what?
hematomas
Why would patients with pacemakers be placed on a blood thinner?
because anytime something foreign enters the body, the body will try and reject it so the body will try to create blood clots to encapsulate the pacemaker (which would cause it to fail)
Taking a blood thinner will prevent this problem
Conditions for Blood Thinners
- heart disease
- poor blood circulation
- recent surgeries requiring drainage (such as major abdo or breast surgery where drains are great entry ways for infection and clotting leading to blockages so patients will be placed on blood thinners until drains are removed)
- abnormal heart beats (a-fib)
- congenital heart defects
- clotting conditions - Hx of MI, CVA, angina, DVT, PE
Anti-coagulants - what are they, common medications, and who they are prescribed to
- drugs that keep your body from clotting easily by interfering with the blood clotting process
- used to prevent ischemic strokes and TIAs
- # 1 anticoagulant: warfarin (Coumadin, Jantoven, Marfarin)
- Short term therapy - injection
- Long term therapy - pill
- used to prevent clots from forming or to prevent existing clots from getting bigger
- Often prescribed to: people with artificial heart valves, those with irregular heart beats, or those who have had hx of heart attack/stroke
Anti-platelets - what are they, medication names, and who they are prescribed to
- prevent blood clots; work by making it more difficult for platelets in your blood to stick together (the first step in clot formation)
- clopidogrel (Plavix) and aspirin (although ASA has anti-platelet properties but not considered a true anti-platelet)
- Sometimes prescribed to: those with hx of ischemic strokes or heart attacks
- Are taken on a regular basis for an extended period for prevention of heart attack and stroke
Medication names for anti-coagulants
heparin
warfarin
rivaroxaban
apixaban
Medication names for anti-platelets
clopidogrel
aggrenox
ASA properties
Adverse Reactions and Side Effects of Blood Thinners
Symptoms are usually on initial onset of taking the drug, then subside/go away all together
- increased bruising (such as hematomas)
- red or pink urine
- stools that are coffee grounds
- inreased menstrual bleeding
- purple toes - circulation issue (stagnant blood that gets deoxygenated, as well as improper perfusion
- pain with temp changes
- blood thinners take away temp regulation properties (so ppl often feel cold as blood cannot rise up and stay)
Dyslipidemia/Cholesterol Lowering Medications
- works by blocking a subtance your body needs to make cholesterol
- lowers bad cholesterol (LDL) & has properies to safely prevent heart disease in certain aults (40-75 y.o.)
- may also help body reabsorb cholesterol that has built up in plaques on your artery walls, preventing further blockage in your blood vessels and thus heart attacks
- related to cardiac meds because of dx of DLD = risk of HTN and MI as well
- besides medications, stents can also be used to widen arteries (up to 5 stents - CABG)
Family drug name for DLD medications
statin
Medication names for DLD
- Lipitor (atorvastatin)
- Altoprev (lovastatin)
- Livalo (pitavastatin)
- Pravachol (pravastatin)
- Crestor (rosuvastatin)
- Zocor (simvastatin)
Cardiac medications that paramedics can give patients
NTG (nitroglycerin)
ASA (aspirin)
Paramedic use of nitroglycerin (NTG)
- QUICK-ACTING (within minutes)
- used as a vasodilator
- used to treat angina symptoms - chest pains or pressures (extremely high pressures like pulmonary edema)
- helps restore blood flow into the heart
- reduces how hard the heart has to work to circulate oxygenated blood
- if the pains go away (it was angina); if it doesn’t go away (then not angina)
Paramedic use of ASA
- treat pain, fever, or inflammation
- chest pains or MI
- used as anti-clotting agent
- used to prevent secondary heart attacks or CVAs
- for MIs, must be chewed (passive diffusion - works in a couple minutes)
- Dose: 2 x 80mg ASA (if they’ve already self-administered prior to EMS arrival and are still having pain, paramedics can dose them again)
- Therapeutic dose: 380 - 420 mg of ASA
Which will always be beneficial in saving lives, ASA or nitroglycerin?
ASA - will always be beneficial
vs
nitro may sometimes turn someone into asystole
Cardiomyopathy
disease of heart muscles - three types:
hypertrophic
dilated
restrictive
Hypertrophic cardiomyopathy
- one side of the heart is excessively large (usually LV) - more muscular/thickened
- diastolic dysfunction
- risk of sudden death in young athletes
- thickened left ventricular wall
Dilated cardiomyopathy
- enlargement of all cardiac chambers
- systolic dysfunction
- MOST COMMON TYPE
Restrictive Cardiomyopathy
- rigid ventricular walls
- diastolic dysfunction
- LEAST COMMON TYPE
True or false. HTN is always caused by some other underlying condition.
True. It’s a finding/secondary disease to some other cause
Treatment for cardiomyopathy.
remember that you cannot determine what kind of cardiomyopathy the patient has (until an autopsy is done) so treatment applies to all types
- anti-arrhythmics: keeps heart beating with a normal rhythm/prevent arrhythmias
- ACE inhibitors, ARBs, BBs, or CCBs: lower BP
-
anticoagulants: to prevent formation of blood clots
- often used to those who have dilated cardiomyopathy to PREVENT blood clots
Treatment for atrial fibrillation.
- beta blockers, anti-arrhythmics, blood thinners
- anyone with a-fib should also already be on a blood thinner (to reduce stroke risk) and beta blocker (to control irregular heart rhythm)
True or False. Right ventricular infarctions are treated with nitro.
FALSE. giving patient with RVI nitro will dilate heart and bottom it out, leading to asystole (i.e. induce hypotension and cardiac arrest)
Treatment of STEMIs
- nitro and ASA (exception is RVI)
- STENTS (bypass ER and straight to HIU)
- ALWAYS put defib pads on in case of VSA
In STEMIs, muscle damage risk is highest when?
in the first few hours
Normal BP
SBP <120
DBP < 80
Elevated BP
SBP: 120 - 129
DBP: <80
Hypertension (Stage 1)
SBP: 130-139
OR
DBP: 80-89
Hypertension (Stage 2)
SBP: 140 or higher
OR
DBP: 90 or higher