Q2 - Cardiac Flashcards
If a patient has stage 1 hypertension but is young and has a very low ASCVD risk, what is the 1st line of tx?
65yo patient with stage 1HTN and mod-high ASCVD risk?
No drug therapy needed- diet and lifestyle modifications first
Lifestyle mods AND drug therapy.
If an individual has albuminuria, what does that mean in relation to their BP?
Threshold for starting anti-hypertensive meds is lower and need ACEi and ARBs.
Which antihypertensive classes work on the vascular smooth muscle? MOA?
A1 blockers, CCBs and AT receptor blockers.
Vasodilation.
What 2 classes of antihypertensives influence renin and therefore lower BP?
Beta blockers and thiazide diuretics.
Study pharm free form image 1
What are 1st and 2nd line therapies for the tx of hypertension?
1st line = ACD (Ace/ARB, CCB and diuretics)
2nd = AA (aldosterone agonists), BB, vasodilators and alpha blockers (peripheral and central)
Clinical considerations with the use of ACE inhibitors.
-Check SCr 7-10 days post therapy initiation.
-No K supplements or salt substitutes
-Do not combine ACE with ARBs or direct renin inhibitor.
-avoid in pregnancy
-can cause angioedema.
Do not combine ACE inhibitors with ______
ARBs or direct renin inhibitors.
Examples of ACE inhibitors.
Which ones give on an empty stomach?
“-April or -opril”
Catopril /Moexipril
Acronym for ACEi SEs?
C cough
A angioedema
P pressure (low)
T taste (metallic)
O omit in pregnancy
P potassium elevation
R renal impairment/rash
I impotence
L leukocytosi
Examples of ARBs.
Clinical considerations?
“-sartan”
-Do not combine with ACE or direct renin inhibitors
- increases risk of hyperK in CKD
-do not use if hx of angioedema with ARBs/ACEi
-avoid in pregnancy
What is special about losartan?
ARB
Prodrug so not all patients have hormones necessary to convert to active drug form.
Can lower Uric acid and prevent gout attacks.
ARB/Sartan SE acronym
S systolic BP lowering
A angioedema
R renal impairment (NOT use in bilateral renal artery stenosis)
T too much K
A abdominal px, diarrhea, vomiting
N not in pregnancy
What are the 2 sub groups of CCBs and their MOAs?
Which ones preferentially affect the heart?
non-dihydropyridine (non-DHP)
Dihydropyridine (DHP)
MOA: block cellular entry of Ca through L-type ca channels.
non-DHP CCB preferentially affect the heart
DHP preferentially affect the smooth muscle (acting peripherally)
What class of medications can be used in variant angina?
Or prinzmental’s angina
CCBs.
Why can LE swelling be an SE of CCBs?
CCBs act to dilate the arteries but not much action on the veins (like a 3lane highway merging into a 2 lane highway) so blood gets backed up in the venous system.
How can you differentiate LE swelling as an SE of CCBs or LE swelling from heart failure?
CCB related LE swelling does not respond to diuretics.
Clinical considerations for CCBs?
DHP
-Do not use in HFrEF (except for amLodipine or felodipine)
non-DHP
-avoid combo with BB -> bradycardia and heart block
-substrate and CYP3A4 inhibitor so lots of DIs.
Examples of CCBs
“-dipine” (DHPs) and
Diltiazem and Verapamil (non-DHP)
Do DHPs have central or peripheral effects?
Peripheral.
Non-DHP preferentially affect the heart centrally.
Good medication for females with benign tachycardia and HTN?
Diltiazem (non-DHP CCB)
What CCB should be taken on an empty stomach?
Nifedipine.
Sometimes this is the issue with patients who do not have an expected response to this medication - all they have to do is start taking it on an empty stomach and they will start to see >10mmHg decrease in SBP.
DHP CCB (peripheral) and non-DHP (central) SEs acronym
DHP
C constipation
H headache
A ankles (edema)
P palpitation
P pulmonary E edema
D dizziness (orthostatis)
non-DHP
L limit grapefruit juice (CYP3A4)
I insomnia
P potent CI
S skin rash
Clinical consideration for diuretics
Electrolyte imbalances (hypO Na and K, HypER glycemia and uricemia)
K sparing diuretics (Amiloride/triamtaren) are usually used in combo
Chlorthalidone is preferred over ________ based on_______
Hydrochlorothyazide
Prolonged half life and reduction in CVD.
Examples of Loop diuretics
Clinical considerations?
Ethacrynic Acid
Bumetanide
Furosemide
Torsemide
Preferred in patients with HF
Preferred in patients with CKD.
Which diuretics are preferred in patients with HF and CKD?
Patients with primary aldosteronism and resistant HTN?
Loop diuretics
Aldosterone antagonists.
SE of spironolactone?
gynecomastia
(Lactone sounds like lactose in milk from boobs)
Spironolactone is the ____ line aldosterone agonist diuretic.
1st
Where do loop diuretics work?
Thiazides?
K sparing diuretics?
Distal end of loop of Henle
DCT
Collecting duct
Diuretic SEs acronym
D decrease in Na uptake
I increase in K excretion (xcept for K sparing)
U uricemia (gout)
R renal fxn (not effective if eGFR is <30)
E electrolyte disturbances
T take in the AM (xcept HCTZ)
I increased orthostasis
C calcemia
What antihypertensives may be favorable in elderly females?
Diuretics . Increased Ca reuptake which helps slow Osteoporisis development.
Which beta-adrenoceptor agonists (or BBs) are okay for use in COPD and asthma?
Beta1 selective agonists
Examples of BBs
And clinical considerations
“-lol”
-BB not recommended as 1st line
-Carvedilol no longer preferred in pts with HFrEF
-avoid abrupt cessation
A patient who has been taking carvedilol has lost 20lbs and been on the Mediterranean diet for 3 months. She wants to stop her BP meds to see if her BP has returned to baseline with her lifestyle modifications. You advise her to:
Do not stop abruptly and titration to avoid adverse effects.
BBs should not be stopped abruptly.
BB SE acronym?
B bradycardia/B bronchoconstricton (B2)
L lipidemia increased/L libido decreased
O ocular SEs
C conduction abnormalities
K konstriction peripherally (cold fingers/nose)
E exhaustion (sleep disturbances/lethergy)
R reduces recognition of hypoglycemia.
A diabetic patient shares with you that she knows when her sugars are low because she starts to get “the shakes”. How should you council her before starting a new BB medication?
BBs can mask the effects of hypoglycemia (such as tremors or shakes) so she should use other methods to check if her sugars are low.
What is Aliskiren
A direct renin-inhibitor
2ndary agent.
Do not combine with ACE/ARB
Examples of Alpha 1 blockers, indications for use and MOA
Doxazosin (urinary BPH symptoms), Prazosin (PTSD nightmares), Terazosin (urinary BPH symp)
Take at bedtime. May increase risk for stroke
Reduce artery resistance by relaxing the muscle tone.
Alpha 1 blockers are ______ acting while alpha 2 blockers are _____ acting
1 = peripheral
2 = central.
What line of tx are alpha 2 agonists? Why?
Example?
Clinical considerations?
Last line - too many CNS SEs since they are centrally acting.
Clonidine.
Taper. Avoid abrupt discontinuation = rebound HTN
Which type of HF is associated with pulmonary HTN? What are the two types of Lsided HF?
R sides
L HFpEF = diastolic dysfxn
L HFrEF = systolic dysfxn.
Pre-HF (stage____) have an LVEF of ______. Appropriated Meds for this stage?
B
< or equal to 40%
ACEi/ARB or BB.
Stage A, B, C and D for HF
A = increased risk
B = LVEF> or = to 40%
C = LVEF < or = to 40%
D = refractory HF.
CDMMT (comprehensive Disease-Modifying Medical Therpy) decreases what outcomes if implemented early?
CV death or HF hospitalization
Or emergency urgent visits for worsening HF.
Which beta blocker is used for patients with HFrEF
Metoprolol succinate.
What might be the DI if a patient with HF is not getting an adequate response from taking a direct vasodilator medication?
Since vasodilation activates the baroreceptor reflex resulting in an increased SNS outflow = Tachy, increased CO and renin release.
If the patient is also taking a sympathetic inhibitor or a diuretic, this response will be blunted.
Direct vasodilators approved for HF + MOA
Hydralazine - reduces afterload through arterial smooth muscle relaxation
Isosorbide - reduces preload by causing venous vasodilation.
What medication could work the same as nitrates in treating HF and eliminate the need for a nitrate free interval?
Hydralazine Isosorbide
What is ivrabadine?
MOA:
A medication approved to treat HF for patients in NSR (CI in AFIB) who are still having symptoms after max BB dose and HR still >70.
DC if HR<50bpm.
MOA:selectively inhibit cardiac pacemaker current If in the SA node which slows and decreases HR.
What is Digoxin’s MOA? What is it used to treat? Considerations?
Inhibits the Na/K pump in myocardial cells which increases intracellular Na which increases Ca influx which increases cardiac contractility.
HF in patients with AFIB and NSR.
N/V/D, electrolyte disturbances and s/s of toxicity (anorexia, blurred/yelllow vision, confusion)