CARDIOLOGY Flashcards
differences between STEMI and NSTEMI
STEMI: ST elevation +elevated troponin. Complete occlusion of blood vessels resulting in necrosis of myocardium
NSTEMI: ST depression + elevated troponin, partial occlusion of blood vessels resulting in necrosis of myocardium
differences between stable and unstable angina
stable: exercise induced, no minimal ECG changes with no changes in troponin
unstable: often occurs while resting, sleeping or minimal physical activation. ST depression with no changes in troponin. Can lead to heart attack
symptoms of angina
chest heaviness, pressure, pain and discomfort.
chest symptoms may radiate to upper body, last <5 mins and received by rest or nitroglycerin
symptoms of ACS
same as angina but
lasting > 5 mins and not relieved by nitroglycerin
treatment for stable angina
chronic:
BB and/OR
NTG and/ OR
DPH ( long acting)
decreasing mortality:
anti platelet ( ASA or clopidogrel) statin
ACE-I or ARB
how many total dose of NG spray can u administer
total 3 doses
what condition does ACS compromise of
unstable angina
NSTEMI
STEMI
What is TIMI risk score ?
estimates mortality, recurrent MI or severe recurrent ischemia requiring urgent revascularization for patients with unstable angina and NSTEMI
high risk if TMI >/3
what medication to start post MI
A= ACE-I,
B- BETA BLOCKER
C- cholesterol - statin
D: DUAL ANTIPLALET
know treatment algorithms for UA/NSTEMI
SEE PIC
when would you choose fibrinolytic vs PCI
what is the absolute CI?
fibrinolytic: <1 hr presentation, when PCI is not an option, delay to invasive strategy
PCI: skilled PCI lab available, high risk STEMI, , late presentation >3 hrs, diagnosis in doubt
MOA of fibrinolytic?
CI?
altepase, tenecteplase
conversion of plasminogen to plasmin in the presence of of fibrin, resulting in fibrinolysis
any suspected hemorrhage or bleeding, known vascular lesion, or ischemic stroke within 3 months
know algorithm to STEMI
See pic
Which heparin should be used? how long should they be one this ?
UFH: STEMI patient receiving fibrinolytic.
LMWF ( enoxaparin has been shown to be superior to UFH in patients treated with tenecteplase
Heparins should be continued for a minimum of 48 hours ( or until PCI) and use can be extended in patients with high-risk features.
what is the MOA of UFH? AND AE?
potentiates antithrombin, inhibits factor Xa and IIa
AE: bleeding, HIT , osteoporosis
when should we initiate beta blocker ? what should the HR be?
BB in the first 24 hrs to all patient without contraindications,
Titrate to resting HR: 55-65 bpm
know duration of DAPT THERAPY
DAPT 1 year , if not at high risk of bleeding, continue DAPT for 3 years
if high risk after 1 year, SAPT ( ASA 81mg once daily or Clopidogrel 75 mg
when should be hold DAPT therapy for surgery
BMS: at least 1 month after PCI
DES: 3 months after PCI
switching between ticagrelor and prasugel?
prasugel to ticagrelor: no loading dose, ticagrelor 90 mg BID is recommended
Ticagrelor to prasugel: LD of 60 prasugel mg followed by 10 mg daily
switching from clopidogrel to ticagrelor or prasugel
clopidogrel to ticagrelor: LD ticagrelor of 180 mg followed by 90 mg BID
clopidogrel to prasugel: LD of 60mg followed by 10 mg regardless of timing of clopidogrel dose
when should u delay CABG surgery in patient taking ASA, clopidogrel , ticagrelor or prasugel?
ASA- continue
ticagrelor: 48-73 hrs (2-3 days) before CABG
clopidogrel: 48-73 hrs (2-3 days) before
prasugel: 5 dyas
patient with AF without high risk features who undergo elective PCI:
AGE < 65 AND CHAD2=0
ASA+ clopidogrel: at least 1 moth for BMS and 3 months for DES and up to 12 months
Age >/ 65 OR CHAD2>/1
OAC + clopidogrel ( 1 month for BMS and 3 months for DES)
AF + PCI FOR ACS or high risk elective PCI
AGE < 65 and CHAD2=0
ASA+ P2Y2 Inhibitor2 ( ticagrelor or prasugrel preferred over clopidogrel for ACS )- up to 12 months
AGE >/ 65 OR chads>/1
reduced OAC+ ASA+ Clopidogrel
ASA stop 1 day post PCI or anytime up to 6 months
followed by: clopidogrel + OAC up to 12 months
ACE-I and ARB AE
hypotension ( dizziness, headache), dry couch, hyperkalemia
ARB: similar to ACE but less dry cough and less angioedema
ACE- CI
pregnancy, bilateral renal artery stenosis, history of angioedema
list BB that are non-selective, selective , alpha blocking activity
non -selective: TPN ( Timolol, propanolol, nadolol)
B1 selective: Nebivolol, ABM (metoprolol, bisoprolol, atenolol) -
Non selective + ISA : pinolol
Selective + ISA: acetbutolol
with alpha blocking activity: labetalol
what the difference b/w different types of BB
B1 selective- less non cardiac AE due to B1 selectivity
alpha blocking activity: additional AE ( dizziness, edema, nasal congestion, postural hypotension)
DHP- CCB AE ?
hypotension, headache, peripheral edema, flushing, gingival hyperplasia ( amlodipine)
why is nifedipine not recommended
avoid short acting nifedipine because it increases risk of MI and death
NON-DHP CCB MOA and AE
Blocks voltage-gated calcium channels but are more cardio-selective than DHP-CCBS
constipation ( verapamil), anorexia, dizziness, bradycardia; heart bock, new or worsening heart failure
DI for NON-DHP CCB
strong CYP3A4 Inhibitors BBS antiarrhythmics ( digoxin, amiodarone) anti-hypertensives CYP3A4 substrates ( simvastatin) Verapamil can also increase digoxin levels
AE of clopidogrel? MOA?
MOA: P2Y12 inhibitor
diarrhea, rash, bleeding, purpura
AE of prasugel and CI?
increased bleeding risk, headache, nausea, dizziness
hypercholesterolemia, atrial fibrillation
CI: >75 years < 60kg, history of ischemic stroke
what are symptom of atrial fibrillation
palpitation, tachycardia, SOB, light headedness, syncope, decreased exercise capacity
describe different classification of atrial fibrillation ( paroxysmal, persistent, permanent/chronic )
paroxysmal: episodes lasting less than 30 seconds, terminating within 7 days ( spontaneous)
Persistent: lasting longer than 7 days up to 1 year
sinus rhythm restored by cardioversion or medications
permanent: continuous episode longer than 1 year, decision made not be pursue sinus rhythms restoration
what factors is included in CHADS-65 SCORE?
what is the score use for
CHF ( 1 POINT ) HTN ( 1 POINT AGE >/ 65 DIABETES STROKE (2 POINTS)
estimates risk of stroke in patient with afib
when would anti platelet be considered in AFIB?
< 65 YEARS, CHADS-65 <0 with CAD or PAD`
when would DOAC be preferred over warfarin?
NVAF: DOAC recommended
AF+ mechanical prosthetic valve or moderate mitral stenosis: warfarin
BB preferred in the presence of : LV dysfunction, hypertension, CAD
LV dysfunction: bisoprolol or carvedilol
hypertension: atenolol or metoprolol
CAD: atenolol, propanolol or metoprolol
which DOAC can be dose down to 15 ml/min
apixaban
DOAC that has high risk of dyspepsia
dabigatran
DOAC that is dose once daily
rivaroxaban and edoxaban
when will u dose apixaban 2.5mg BID
A: age > 80
B: body weight <60 mg
C: serum creatinine> 133mmol/ L
meet 2/3 criteria
MOA of warfarin
inhibitors VKORC1
affect factors 2,7,9,10 and protein C and S
when is rhythm control preferred
recently diagnosed AF ( within a year) highly symptomatic significant QOL impairment multiple recurrences difficult to achieve rate control arrthymia-induced cardiomyopathy
treatment for paroxysmal AF
low recurrence burden: observation + pill in pocket
which agent for rhythm control
Heart failure:
LVEF < 40%: amiodarone
LVEF > 40% amiodarone or sotalol
CAD : Amiodarone, dronedrone, sotalol
No HF or CAD: amiodarone, dronedrone, flecainide, propafenone, sotalol
WHICH BB is preferred in AF and LVEF < 40%
bisoprolol, carvedilol, metoprolol
can we used ND-CCB in LVEF < 40%
NO, you can used LVEF >40% ( diltiazem or verapamil)
CI of NDHP-CCB
pre-excitation, CHF, or LV dysnfuction
which AAD needs to be combine with AV-nodal blocking agent, why?
flecainide, propafenone, both can decrease the refractory period of the AV node, thereby increasing the ventricular rate
what is the pill in pocket strategy
flecainide or propafenone can be taken intermittently or as booster dose as outpatient
AE of digoxin
anorexia, N/V, weakness, dizziness, visual changes
explain virchow’s triad
hemodynamic changes: alteration in blood flow, blood stasis or turbulence
Hyper coagulable state: change in clotting functions that can be inherited of acquired
vascular injury: damage to the blood vessels’ endothelium, activates the coagulation cascade
treatment of HIT
start alternative agent: Lepirudin, fondaparinux, argatroban transition to warfarin once patient stabilized and platelets >100 000 /mm3
difference between LMWH and UFH
potentiates anti thrombin III inactivating thrombin ( as well as Xa) and preventing
conversion from fibrinogen to fibrin
more predictable anticoagulation dose response than UFH, decreased incidence of HIT, decrease need for routine monitoring and decrease major bleeding compared to heparin
antidote for UFH and LMWH
protamine sulphate
when is UFH preferred over LMWH
UFH in severe renal impairment, those at high risk of bleeding who may require rapid reversal and patient who have very recently received thrombolytic therapy
what is the role of fondaparinux
selective factor Xa inhibitor
better efficacy over heparins
does not require routine coagulation monitoring
** can be used in patient with current of history of HIT
treatment for VTE with dabigatran
cannot be used as initial therapy- use full dose of LMWH or hepairin for 5-10 days before switching to dabigatran 150mg PO BID
switching heparin, LMWF or warfarin to DOAC
No need to bridge with heparin or LMWF
for warfarin, start DOAC when INR <2 ( dabigatran and apixaban) or when INR <2.5 ( edoxaban) or INR < 2.5-3 ( rivaroxaban)
what are statin indicated conditions
LDL > 5.0 mol/ L
diabetes: age >40 years old, age >30 and DM x>/ 15year duration (Type 1 DM)
microvascular disease
CKD
Atherosclerotic cardiovascular disease ( ASCVD)