Shared Flashcard Set

Details

USMLE Step 1 Cardiac
DIT Cardiac
164
Medical
Graduate
05/18/2010

Additional Medical Flashcards

 


 

Cards

Term
What 3 structures are contained in the carotid sheath?
Definition
"VAN" 1. Internal Jugular Vein (lateral) 2. Common Carotid Artery (medial) 3. Vagus Nerve (posterior)
Term
Where do coronary artery occlusions most commonly occur? Where does this supply?
Definition
Left Anterior Descending (LAD), supplied the anterior interventricular septum
Term
What are the 2 equations for Mean Arterial Pressure?
Definition
MAP = (1/3)systolic pressure + (2/3)diastolic pressure......... MAP = CO x TPR
Term
What is Fick's Principle equation for Cardiac Output?
Definition
CO = (rate of O2 consumption)/(change in arterial O2 content)
Term
What 3 factors affect stroke volume?
Definition
"CAP"...Contractility, Afterload, and Preload
Term
What is the equation for ejection fraction?
Definition
EF = (SV/EDV) = (EDV-ESV)/EDV
Term
What is a "normal" ejection fraction value?
Definition
>55%
Term
Name 3 things that can increase viscosity...
Definition
1. polycythemia
2. hyperproteinemic states (MM)
3. hereditary spherocytosis
Term
Resistance is inversely proportional to the ______ to the 4th power?
Definition
radius
Term
Under what conditions is an S3 sound considered "normal"?
Definition
in children and pregnant women
Term
Name 4 conditions that can result in an S3 heart sound
Definition
1. Dilated cardiomyopathy
2. Left-->Rt shunt
3. CHF
4. Mitral regurgitation
Term
Name 5 conditions that can result in an S4 heart sound
Definition
1. Left Ventricular Hypertrophy
2. HOCM
3. Aortic stenosis
4. MI
5. chronic HTN
Term
What gives rise to the jugular venous A, C, and V waves?
Definition
A = atrial contraction
C = rt ventircular contrxn (tricuspid valve bulging into atrium)
V = increased atrial pressure due to filling against closed tricuspid valve (atrial filling)
Term
What are 2 situations that lead to Wide Splitting?
Definition
1. Pulmonic stenosis
2. Rt Bundle Branch Block
Term
In what situation is Fixed Splitting found?
Definition
ASD
Term
In what 2 situations is Paradoxical Splitting seen?
Definition
1. Aortic Stenosis
2. Left Bundle Branch block
Term
With what type of congenital heart defect would increasing afterload be beneficial?
Definition
Anything w/ a Rt-->Left shunt (Truncus Arteriosis, Tetralogy of Fallot, Transposition of Great Vessels)
Term
When does isovolumetric contraction take place?
Definition
the period b/w when the mitral valve closes and the aortic valve opens
Term
Ventricular Action Potential: What re the main electrolytes involved in phases 0-4?
Definition
0 : Na+ channels open
1 : Na+ channels close
2 : Ca2+ channels open
3 : Ca2+ channels close, K+ channels open
4 : Resting potential, high K+ permeability
Term
What phase of the pacemaker potential determines heart rate?
Definition
The slope of Phase 4 (Na+)
Term
Pacemaker action potential: What electrolyte is responsible for each phase?
Definition
0 : upstroke, Ca2+
NO PHASE 1, NO 2 plateau
3 : Ca2+ channels close, K+ channels open
4 : Na+ channels
Term
What does the P wave on ECG indicate?
Definition
atrial depolarization
Term
What does the PR interval on an ECG indicate? What length is considered normal?
Definition
Conduction delay through AV node; normal is <200msec (<1 big box)
Term
What does the QRS complex on an ECG indicate? What is considered normal?
Definition
Ventricular depolarization, <120msec
Term
A narrowed QRS indicates pathology in what part of the heart?
Definition
Above the AV node (ie. Supraventricular)
Term
What does a peaked T wave indicate? A U wave?
Definition
Peak T wave : hypErkalemia
U wave : hypOkalemia
Term
Toursade de pointes is at risk for progressing into what?
Definition
V-fib
Term
What do you treat Toursade de pointes with?
Definition
Mg2+
Term
** Name the 6 classes of drugs that can prolong QT...
Definition
"Big crazy moquitos w/ AIDS and 2 arrhythmias" ... Macrolides, Haloperidol/Risperidone, Chloroquine/mefloquine, Protease inhibitors, 1A antiarrhythmics, and K+ channel blockers
Term
What drug do you use to treat most SVT's, but NOT WPW?
Definition
Adenosine
Term
In what situation do you see delta waves on ECG?
Definition
WPW (exciting the ventricles prematurely)
Term
What 2 drugs can you use to treat WPW with?
Definition
"AP"...Amiodarone and Procainamide
Term
How does it affect the Starling forces and cause edema? Liver failure, nephrotic syndrome
Definition
Decreased plasma proteins (decreased colloid plasma oncotic pressure)
Term
How does it affect the Starling forces and cause edema? Lymphatic blockage
Definition
Icreases interstitial fluid colloid osmotic pressure (more protein in the interstitium)
Term
How does it affect the Starling forces and cause edema? Infections, toxins, burns
Definition
increases capillary permeability
Term
How does it affect the Starling forces and cause edema? Heart failure
Definition
Increased capillary pressure (capillaries are congested f/ the venous end)
Term
Does lymphatic blockage produce pitting or non-pitting edema?
Definition
Non-pitting
Term
Describe a Mobitz type I
Definition
P waves become progressively more spread out until a beat is dropped (dropped QRS)...Predictable dropped beat
Term
What Mobitz is described by a dropped QRS WITHOUT warning?
Definition
Mobitz Type II
Term
What is the MOA of the antiarrhythmic classes 1-4?
Definition
"Nice BabyBoys Keep Clean" I : Na+ channel blockers II : Beta-blockers III : K+ channel blockers IV : Ca+ channel blockers
Term
What has caused the associated HTN? paroxysms of increased sympathetic tone: anxiety, palpitations, disphoresis
Definition
Pheochromocytoma
Term
What has caused the associated HTN? age of onset between 20 and 50
Definition
Primary Essential HTN
Term
What has caused the associated HTN? Elevated creatinine and abnormal urinalysis
Definition
Renal Dz/ failure
Term
What has caused the associated HTN? Abdominal bruit
Definition
Renal Artery stenosis
Term
What has caused the associated HTN? BP in arms > BP in legs
Definition
Coarctation of the aorta
Term
What has caused the associated HTN? Tachycardia, heat intolerance, diarrhea
Definition
hyperthyroidism
Term
What has caused the associated HTN? hyperkalemia
Definition
renal failure
Term
What has caused the associated HTN? abrupt onset in a pt younger than 20 or older than 50, and depressed serum K+ levels
Definition
Hyperaldosteronemia (ie. renal A stenosis)
Term
What has caused the associated HTN? Normal urinalysis and normal serium K+ levels
Definition
Primary essential HTN
Term
What has caused the associated HTN? Young individual w/ acute onset tachycardia
Definition
think stimulants...cocaine, amphetamines
Term
What has caused the associated HTN? hypOkalemia
Definition
hypEraldosteronism
Term
Which anti-HTN drug/drug class causes the following SE? first dose orthostatic hypOtension
Definition
Alpha-blockers ("--osin", ie. prazosin)
Term
Which anti-HTN drug/drug class causes the following SE? ototoxicity (esp. w/ aminoglycosides)
Definition
furosemide
Term
Which anti-HTN drug/drug class causes the following SE? Hypertrichosis
Definition
minodoxil
Term
Which anti-HTN drug/drug class causes the following SE? Cyanide toxicity
Definition
Nitroprusside
Term
Which anti-HTN drug/drug class causes the following SE? dry mouth, sedation, severe rebound HTN
Definition
clonidine
Term
Which anti-HTN drug/drug class causes the following SE? bradycardia, IMPOTENCE, asthma exacerbation
Definition
Beta blockers
Term
Which anti-HTN drug/drug class causes the following SE? Reflex tachycardia
Definition
all vasodilators
Term
Which anti-HTN drug/drug class causes the following SE? cough
Definition
ACEi
Term
Which anti-HTN drug/drug class causes the following SE? Avoid in pts w/ sulfa allergies
Definition
Loop and thiazide diuretics
Term
Which anti-HTN drug/drug class causes the following SE? Possible angioedema
Definition
ACEi
Term
Which anti-HTN drug/drug class causes the following SE? Drug-induced Lupus
Definition
hydralazine
Term
Which anti-HTN drug/drug class causes the following SE? HypErcalcemia, hypOkalemia
Definition
thiazides
Term
Name 4 antihypertensives that are safe to use in pregnancy
Definition
"Lower's Htn in Nice Mamas"
Labetalol, Hydralazine, Nifedipine, and Methyldopa
Term
Which lipid-lowering agent? SE: facial flushing
Definition
niacin
Term
Which lipid-lowering agent? SE: elevated LFTs and myositis
Definition
statins and fibrates
Term
Which lipid-lowering agent? SE: GI discomfort, bad taste
Definition
bile acid resins (cholestyramine, colestipol, etc)
Term
Which lipid-lowering agent? best effect on HDL
Definition
niacin (increases the NICE cholesterol)
Term
Which lipid-lowering agent? Best effects on triglycerides/VLDL
Definition
fibrates (alternative = omega3-FA)
Term
Which lipid-lowering agent? Best effect on LDL/cholesterol
Definition
statins
Term
Which lipid-lowering agent? Binds C.diff toxin
Definition
cholestyramine
Term
A 50yo man is started on lipid-lowering medication. Upon his first dose, he develops a rash, pruritis, and diarrhea. What drug is he taking?
Definition
niacin
Term
How can the flushing rxn cause by niacin be prevented?
Definition
giving aspirin
Term
An abdominal aortic aneurysm is most likely a consequence of what process?
Definition
atherosclerosis
Term
What are the 5 deadly causes of acute chest pain?
Definition
MI, PE, Aortic dissection, unstable angina, and tension pneumothorax
Term
In the evolution of an MI, when does the following occur? contraction bands become visible
Definition
after 1-2 hrs
Term
In the evolution of an MI, when does the following occur? Early coagulative necrosis
Definition
after 4 hrs
Term
In the evolution of an MI, when does the following occur? hyperemia and high risk for arrhythmias
Definition
2-4 days
Term
In the evolution of an MI, when does the following occur? Tissue is yellow-brown and soft
Definition
5-10 days
Term
What are the 4 major risks 5-10 days after an MI?
Definition
1. Free wall rupture 2. tamponade 3. papillary muscle rupture 4. interventricular septal rupture
Term
What will you hear on physical exam that indicates a papillary rupture?
Definition
NEW mitral regurg murmur
Term
In the evolution of an MI, when does the following occur? Increased for ventricular aneurysms
Definition
after 10 days (scar tissue can't contract, so it begins to bulge out)
Term
Most likely cause of the chest pain? ST segment elevation only during brief episodes of chest pain
Definition
Prinzemetal angina
Term
Most likely cause of the chest pain? Rapid onset of sharp chest pain that radiates to the scapula
Definition
Aortic dissection
Term
Most likely cause of the chest pain? Rapid onset sharp pain in a 20yo and assoc w/ dyspnea
Definition
Spontaneous pneumothorax
Term
Most likely cause of the chest pain? sharp pain lasting hrs-days and is somewhat relieved by sitting forward
Definition
pericarditis
Term
Most likely cause of the chest pain? Moat common cause of noncardiac chest pain
Definition
GERD
Term
Most likely cause of the chest pain? Acute onset dyspnea, tachycardia, and confusion in a hospitalized patient
Definition
PE
Term
Most common cause of myocarditis in the U.S.? Followed by what?
Definition
Most common: Coxsackie B virus Followed by: Echovirus and Influenza
Term
What artery perfuses the anterior wall of the heart? What are the corresponding ECG leads?
Definition
Left Anterior Descending (LAD)
Leads: V1->V5
Term
What artery perfuses the inferior wall of the heart? What are the corresponding ECG leads?
Definition
Right coronary artery
Leads: II, III, aVF
Term
What do you treat atrial fibrillation with? What do you use for prophylaxis?
Definition
Treat A-fib with beta-blockers or Ca2+ channel blockers. Prophylaxis = Warfarin
Term
Which 2 beta blockers can exacerbate the pain in a patient w/ angina?
Definition
Acebutolol and Pindolol (they have intrinsic sympathomimetic activity)
Term
What is Beck's triad for cardiac tamponade? (+1)
Definition
1. hypOtension
2. JVD
3. muffled heart sounds
....also PULSUS PARADOXUS
Term
What vasculitis that affects small and medium arteries has a 30% association with Hepatitis B?
Definition
Polyarteritis Nodosa (PAN) "peter PAN flies like a B"
Term
If a patient presents with low hematocrit, will the diameters of theit small arteries be increased or decreased?
Definition
The diameters will be increased in an attempt to maximize the blood flow to the heart
Term
When does the coronary artery fill (systole or diastole)?
Definition
diastole
Term
Endomyocardial fibrosis w/ prominent eosinophial infiltrate = ?
Definition
Loffler's Syndrome (restrictive cardiomyopathy, tropical climates)
Term
With the administration of nitroglycerin, what happens to the EDV and ESV of the left ventricle?
Definition
they both decrease
Term
What is the most specific physical sign of left sided heart failure?
Definition
S3 sound
Term
What murmur? Crescendo-decrescendo systolic murmur best heard in the 2nd-3rd RIGHT interspace close to the sternum
Definition
Aortic stenosis
Term
What murmur? EARLY diastolic decrescendo murmur heard best along the left side of the sternum
Definition
Pulmonary regurg
Term
What murmur? LATE diastolic decrescendo murmur heard best along the left side of the sternum
Definition
tricuspid stenosis
Term
What murmur? Pansystolic (aka holosystolic) murmur best heard at the apex and often radiates to the left axilla
Definition
mitral regurg
Term
What murmur? Late systolic murmur usually preceded by a mid-systolic click
Definition
mitral valve prolapse
Term
What murmur? Crescendo-decrescendo systolic murmur best heard in the 2nd-3rd LEFT interspace close to the sternum
Definition
Pulmonic stenosis
Term
What murmur? Pansystolic (aka holosystolic) murmur best heard along the left lower sternal border and generally radiates to the right lower sternal border
Definition
Tricuspid regurg or VSD
Term
What murmur? Rumbling late diastolic murmur with an opening snap
Definition
mitral stenosis
Term
What murmur? Pansystolic (aka holosystolic) murmur best heard at the 4th-6th left intercostal space
Definition
tricuspid regurg or VSD
Term
What murmur? Continuous machine-like murmur (in systole and diastole)
Definition
PDA
Term
What murmur? High-pitched diastolic murmur with a widened pulse pressure
Definition
Aortic regurg
Term
Name 3 common causes of aortic stenosis
Definition
1. Senile calcifications
2. Congenital bicuspid valve (sxs after 40)
3. Chronic rheumatic valve dz
Term
Which murmurs are best heard in the left lateral decubis position?
Definition
Mitral murmurs
Term
Name 4 signs of Left-sided Heart failure
Definition
1. Dyspnea on exertion
2. Cardiac dilation (S3)
3. Pulmonary edema, paroxysmal nocturnal dyspnea
4. Orthopnea
Term
Name 3 common signs of right sided heart failure
Definition
1. Hepatomegaly (nutmeg liver)
2. Ankle, sacral edema
3. JVD
Term
What is the pneumonic for treating acute heart failure? What does it stand for?
Definition
"LMNOP"...Lasix, Morphine, Nitrates, Oxygen, pressers/positioning
Term
What is the most common site/valve of bacterial endocarditis?
Definition
mitral valve
Term
What is the most common site for bacterial endocarditis in IV drug users?
Definition
Tricuspid valve (drug abusers "TRI" new things)
Term
What happens to Systemic vasular resistance and cardiac output in hypOvolemic shock?
Definition
They both increase
Term
What happens to Systemic vasular resistance and cardiac output in heart failure?
Definition
CO: Decreases (primary problem)
SVR: increases
Term
What happens to Systemic vasular resistance and cardiac output in sepsis/anaphylaxis?
Definition
SVR: decreases (primary activity)
CO: increases
Term
What happens to Systemic vasular resistance and cardiac output in neurogenic shock? (ie. spinal cord injury)
Definition
both decrease
Term
What is the diagnostis criteria for Rheumatic Fever? (ie. JONES major criteria)
Definition
"JONES"
1. Joints (migratory polyarthritis)
2. O "heart shape"...Pancarditis
3. Nodules (subcutaneous)
4. Erythema marginatum (serpiginous skin rash)
5. Sydenham's chorea
Term
What is Kussmaul's sign and why does it occur? What is it indicative of?
Definition
Kussmaul's sign is JVD with inspiration and it occurs bc of decreased capacity of the RIGHT ventricle. Often indicates PERICARDITIS
Term
What is Pulsus Paradoxis and why does it occur? What is it indicative of?
Definition
Pulsus Paradoxis is a decrease in systolic BP by more than 10mmHg w/ inspiration and occurs bc of decreased capacity of the LEFT ventricle. It is often indicative of Cardiac Tamponade
Term
Most likely dx? An IV drug user presents w/ chest pain, tachycardia, and tachypnea
Definition
Bacterial endocarditis of the tricuspid valve leading to pulmonary emboli
Term
Most likely dx? A patient in a MVA presents w/ chest pain, dyspnea, tachycardia, and tachypnea
Definition
tension pneumothorax
Term
Most likely dx? Post-op pt presents w/ chest pain, dyspnea, tachycardia, and tachypnea
Definition
PE f/ a DVT
Term
A young girl w/ congenital valve dz is given penicillin prophylactically. In the ER bacterial endocarditis is diagnosed; what do you treat her with?
Definition
Vancomycin (DOC for empiric tx of endocarditis)
Term
Under what circumstance are you likely to see pulsus paradoxus?
Definition
cardiac tamponade
Term
What heart pathology? diffuse myocardial inflammation w/ necrosis and mononuclear cells
Definition
myocarditis
Term
What heart pathology? focal myocardial inflammation w/ multinucleate giant cells
Definition
Rheumatic fever (Aschoff bodies)
Term
What heart pathology? Fever + IVDA + new heart murmur
Definition
bacterial endocarditis of the tricuspid valve
Term
What heart pathology? chest pain and course rubbing heart sounds in pt w/ Cr of 5
Definition
uremic pericarditis
Term
What heart pathology? Tree-barking of the aorta
Definition
syphilis
Term
What heart pathology? Child w/ fever, joint pain, cutaneous nodules 4 wks after a throat infxn
Definition
Rheumatic fever
Term
What heart pathology? ST elevation in ALL leads
Definition
pericarditis
Term
What heart pathology? Disordered growth of myocytes
Definition
HOCM
Term
What heart pathology? ECG shows Electrical Alernans
Definition
Cardiac tamponade (think about it, currents are sloshing around in pericardial fluid)
Term
What vasculitis? Weak pulses in upper extremity
Definition
Takayasu
Term
What vasculitis? necrotizing granulomas of lung and necrotizing glomerulonephritis
Definition
Wegeners
Term
What vasculitis? necrotizing immune complex inflammation of visceral/renal vessels
Definition
polyarteritis nodosa
Term
What vasculitis? Young male smokers
Definition
Berger's
Term
What vasculitis? Young Asian women
Definition
Takayasu
Term
What vasculitis? Young Asthmatics
Definition
Churg-Strauss
Term
What vasculitis? infants and young children; involved coronary arteries
Definition
Kawasaki's
Term
What vasculitis? Most common vasculitis
Definition
Temporal arteritis
Term
What vasculitis? Associated w/ Hep B infxn?
Definition
Polyarteritis Nodosa (PAN)
Term
What vasculitis? Unilateral headache, jaw claudication
Definition
Temporal arteritis
Term
What vasculitis? Perforation of nasal septum
Definition
Wegener's
Term
Which vascular tumor? benign raised RED lesion about the size of a mole in older pts
Definition
cherry hemangioma
Term
Which vascular tumor? raised, red area present at birth, increases in size initially then regresses over month to years
Definition
strawberry hemangioma
Term
Which vascular tumor? Lesion caused by lymphoangiogenic growth factors in an infected HIV pt
Definition
Kaposi Sarcoma
Term
Which vascular tumor? polyploid red lesion found in pregnancy or after trauma
Definition
pyogenic granuloma (bleed easily if ruptured)
Term
Which vascular tumor? benign, painful red-blue tumor under the fingernails
Definition
glomus tumor
Term
Which vascular tumor? Cavernous lymphangioma associated w/ Turner's Syndrome
Definition
cystic hygroma
Term
Which vascular tumor? Skin papule in AIDS pts caused by bartonella
Definition
Bacillary angiomatosis
Term
What syndrome consists of endomyocardial bibrosis w/ a prominent eosinophilc infiltrate (often in tropical climates)?
Definition
Loffler's Syndrome
Term
Name 4 causes of restrictive cardiomyopathy
Definition
1. amyloidosis
2. hemochromatosis
3. sarcoidosis
4. Loffler's Syndrome
Term
What are the 2 most common complications after an MI?
Definition
1. Arrhythmias (2-4 days)
2. Left sided heart failure
Term
Name the 4 most common locations of atherosclerosis
Definition
1. abdominal aorta
2. popliteal
3. coronaries
4. carotids
Term
An adult pt w/ a hx of HTN presents w/ a sudden sharp, tearing pain radiating to the back. What would you expect to see on CXR?
Definition
Widened mediastinum (aortic dissection)
Term
A 25 yo pregnant woman in her 3rd trimester has a normal BP when standing and sitting. When supine, her BP drops to 90/50. What is the dx?
Definition
Compression of the Inferior Vena Cava
Term
Between which 2 layers lies the pericardial space into which blood fills in cardiac tamponade?
Definition
B/w the epicardium (visceral cardium) and the parietal pericardium
Supporting users have an ad free experience!