Cardiology Flashcards
What is the most common cause of death in the USA?
coronary artery disease
What are some risk factors for coronary artery disease?
- diabetes
- hypertension
- tobacco use
- obesity
- hyperlipidemia
- PAD
- inactivity
- family hx; xx <65 and xy <55
What is the most common cause of chest pain?
- GI
What are characteristics of coronary artery disease?
- chest pain that does not change with body position or respiration
- dull pain
- pain lasting 15-30 minutes
- occurs on exertion
- substernal chest pain
- pain radiates to the jaw or left arm
- not associated with chest wall tenderness
Differential diagnosis with a patient who has pleuritic chest pain (pain that changes with respiration)
- pneumonia
- PE
- pleuritis
- pericarditis
- pneumothorax
Define costochondritis
- chest pain that occurs when palpating chest wall
Patient is an alcoholic and comes to the ED with nausea, vomiting, chest pain, and epigastric tenderness. What should you check for initially?
- amylase and lipase levels as this patient is suspicious for pancreatitis
Patient comes to the ED with chest pain, right upper quadrant tenderness, and a mild fever. What is the first step in management?
- get an abdominal U/S to check for gallstones; top dx with this info is acute cholecystitis
If you hear an S3 gallop on physical exam, what does that indicate?
- a dilated left ventricle *rapid ventricular filling during diastole
If you hear an S4 gallop, what does that indicate?
left ventricular hypertrophy
* atrial systole into a stiff or noncompliant left ventricle
Rales heard on lung examination can be an indication to ?
CHF
Holosystolic murmur is consistent with what defect?
- mitral regurgitation
Best initial test for ischemic type chest pain is?
EKG
What is the best thing to test for to detect reinfarction a few days after initial MI?
- CKMB
Which cardiac enzyme rises first with ischemia?
- myoglobin
What is the most accurate test for cardiac ischemia?
- cardiac enzymes: troponin or CKMB
MOA of troponin C
- binds to calcium to activate actin:myosin interaction
MOA of troponin T
- binds to tropomyosin
MOA of troponin I
- inhibits actin:myosin interaction
A patient has normal EKG and cardiac enzymes on visit to ED for chest pain. He comes back four days later with the same chest pain. What is the next step?
- do a cardiac stress test
When is a chemical stress test needed?
- when the patient cannot exercise to reach the target heart rate
WHen is it necessary to do a stress echocardiogram?
- left bundle branch block
- digoxin use
- pacemaker in place
- left ventricular hypertrophy
A patient has an abnormal stress test that shows reversible ischemia. What is the next step in management?
- angiography
What is the most accurate method of evaluating ejection fraction ?
- MUGA scan
When is sestamibi nuclear stress testing used?
- obese patients and those with large breasts because of its ability to penetrate tissue
What is the best initial treatment with a patient who has acute coronary syndrome?
- aspirin
What medications are given to those who are undergoing angioplasty and stent placement?
- block aggregation of platelets to each other by inhibiting ADP induced activation of the P2Y12 receptor, such as clopidogrel, ticagrelor, or prasugrel
What is the time frame for when angioplasty should be performed with a patient with a STEMI?
- w/i 90 minutes of ED arrival
When should a patient receive thrombolytics for an MI?
- w/i 30 minutes of ED arrival
ACE inhibitors only lower mortality if?
the patient has left ventricular dysfunction or systolic dysfunction
If the patient cannot have thrombolytics, what is the best way to lower mortality?
- urgent angioplasty or PCI
What is the most common cause of death in both CHF and MI?
- ventricular arrhythmia brought on by ischemia
When do you use prasugrel, clopidogrel, or ticagrelor?
- patient is undergoing angioplasty
- patient has an aspirin allergy
- patient with acute MI gets one of these + aspirin
When do you use verapmil or diltiazem?
- patient has intolerance to beta blockers (asthma, cocaine induced chest pain, or coronary vasospasm)
When do you use lidocaine or amiodarone?
- if patient has VTac or VFib
When does a patient need a pacemaker?
- 3rd degree heart block
- Mobitz II, second degree AV block
- Bifascicular block
- New LBBB
- Symptomatic bradycardia
Prasugrel has a higher efficacy that clopidogrel; however, it increases bleeding in those with which conditions?
- age >75
- weight < 60kg
- stroke victims
what is the diagnostic test for cardiogenic shock?
- echo
- swan-ganz catheter
What is the tx for cardiogenic shock?
- ACEi
- urgent revascularization
What is the diagnostic test for valve rupture?
- Echocardiogram
What is the treatment for valve rupture?
- ACEi
- nitroprusside
- intra-aortic balloon pump as a bridge to surgery
What is the diagnostic test for septal rupture?
- echocardiogram
- Swan-ganz catheter
Tx for septal rupture
- ACEi
- nitroprusside
- urgent surgery
What is the diagnostic test for myocardial wall rupture?
- echocardiogram
Tx for myocardial wall rupture
- pericardiocentesis
- urgent cardiac repair
What is the diagnostic test for sinus bradycardia?
EKG
Tx for sinus bradycardia
- atropine followed by a pacemaker if the patient is still having symptoms
How to diagnose third degree heart block?
- EKG
- canon a waves present
Tx for third degree heart block
- atropine and a pacemaker even if the symptoms resolve
How to diagnose right ventricular infarction?
- EKG showing right ventricular leads with the ST segment elevation
Tx for right ventricular infarction
- fluid loading
Which way is the blood shunted in a septal rupture?
- left to right due to the higher pressure in the left ventricle
Post-MI, what medications should a patient be on when going home?
- statin
- ACEi
- beta-blocker
- aspirin
- clopidogrel
How long should a patient wait to have sex after having an MI?
- 2-6 weeks
What are the special differences when treating an NSTEMI compared to a STEMI?
- no thrombolytic use
- use low molecular weight heparin
- use of glycoprotein 2b/3a inhibitors
Name some GP2b/3a inhibitors
- eptifibatide
- tirofiban
- abciximab
When are thrombolytics used in MI cases?
- STEMIs
- new LBBB
- within 12 hours of the initial symptoms
In what case will heparin not work?
- antithrombin deficient patients
MOA of heparin
- prevents new clots from forming via potentiating antithrombin, which inhibits almost every step of the clotting cascade
When to use an ARB instead of an ACEi?
- patient has cough ADR from the ACEi
Main ADR of both ACEi and ARBs?
- hyperkalemia
What is used to determine who is a candidate for coronary artery bypass grafting?
- angiography
What are the four indications for coronary artery bypass grafting?
- three coronary vessels with >70% stenosis
- left main coronary artery stenosis > 50-70%
- 2 vessels >70% in a diabetic
- 2 or 3 vessels with low ejection fraction
You will see a reduced ejection fraction in which type of dysfunction?
- systolic
What is the main difference between saphenous vein graft and internal mammary artery graft?
- Internal mammary artery graft remains open for 10 years
When do most vein grafts start to become occluded?
- in five years
MOA of ranolazine
- inhibits late I(NA) channels, which prevents overload of sodium
When is ranolazine added to the Post-MI regimen?
- when the other medications do not control the pain
MOA of proprotein convertase subtilisin kexin type 9 PCSK9 inhibitors
- reduce LDL by blocking the clearance of LDL by the liver from the blood
What is the most common ADR of a statin?
- liver toxicity
What should be checked routinely in a patient with a statin?
- LFTs since statins increase transaminases
Besides raising the transaminases, what other ADR is less common when using a statin?
- rhabdomyolysis
What is the most important reason why we use statin drugs?
- They have the greatest effect on lowering mortality than any other medication.
What is the risk of the Framingham scale to prescribe a statin?
> 7.5% in 10 years
Which two diseases should the LDL be controlled to be under 70 mg/dL?
- those with diabetes and or coronary disease
When do you use PSCK9 inhibitors?
- When patient is on max dose of a statin and still needs their LDL to be lower
Give two examples of a PSCK9 inhibitor
- evolocumab
- alirocumab
What is the most common cause of erectile dysfunction post MI?
- anxiety
What class of medications are contraindicated when a patient is on a medication such as sildenafil?
- nitrates
What are some common characteristics of presenting CHF?
- SOB on exertion
- edema
- rales on lung exam
- ascites
- JVD
- S3 gallop
- orthopnea
- paroxysmal nocturnal dyspnea
- fatigue
What causes rales in the lungs?
- Increased hydrostatic pressure develops in the pulmonary capillaries from left heart pressure overload. This causes transudation of liquid into the alveoli.
During inhalation, the alveoli open with a popping sound–> rales
What is the worst manifestation of CHF?
- pulmonary edema–> can make clinical diagnosis from this
MOA of carvedilol
- same as labetalol: both beta 1 and 2 blocker and alpha-1 receptor
What are four basic things that should be ordered when suspecting CHF?
- CXR
- EKG
- oximeter
- echocardiogram
What is the first line tx for acute pulmonary edema?
- oxygen
- furosemide
- nitrates
- morphine
MOA of inamrinone and milrinone
- phosphodiesterase inhibitors that increase contractility and decrease afterload due to vasodilation
MOA of dobutamine
- beta-1 agonist leading to increased contractility and decreased afterload due to vasodilation
MOA of dopamine
- increases contractility but acts on alpha 1 receptors, leading to vasoconstriction
What can cause respiratory alkalosis in CHF?
- fluid overload causes patient to be hypoxic–> patient then hyperventilates–> decreases PCO2
Tx for those with systolic CHF dysfunction
- ACEi or ARBS
- beta blockers
- hydralazine + nitrates if the above three are contraindicated
- digoxin to decrease symptoms
- mineralocorticoid receptor antagonists (spironolactone, eplerenone)
Most common ADR of mineralocorticoid receptor antagonists?
- hyperkalemia
ADRs of spironolactone
- gynecomastia
- erectile dysfunction
If a patient is on an ACEi, beta blocker, MRA, digoxin, and diuretic but is still symptomatic, what should you add to their tx?
- hydralazine and nitrates
What is the main treatment management for diastolic CHF dysfunction?
- MRAs (mineralocorticoid receptor antagonists)
A patient with pulmonary edema has V tac. What is the best therapy?
- synchronized cardioversion
A patient with pulmonary edema can have v tac, a fib, a flutter, or SVT, what is the best therapy?
- synchronized cardioversion
When is unsynchronized cardioversion used?
- v fib, v tac without a pulse
When do you use nesiritide?
- when dobutamine, inamrinone, milrinone fail
MOA of nesiritide?
- synthetic version of atrial natriutretic peptide
If BNP levels are normal, it excludes ____ as the diagnosis.
- CHF
A patient with pulmonary edema has a right catheter placed. What would be found for cardiac output, systemic vascular resistance, wedge pressure, and right atrial pressure?
- cardiac output= decreased
- systemic vascular resistance = increased
- wedge pressure= increased
- right atrial pressure = increased