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Step 1 - Cardio
First Aid 2012
140
Biology
Professional
05/21/2012

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Term
What artery supplies the SA node
Definition
Right Coronary
Term
What artery supplies the AV node
Definition
Right Coronary
Term
What artery supplies the inferior wall
Definition
Posterior Descending branch of Right coronary in 80-90% of people (right dominant)
10-20% of people have posterior descending branch of Circumflex
Term
What artery supplies the right ventricle
Definition
Acute marginal branch of the right coronary
Term
What artery supplies the posterior left ventricle
Definition
Circumflex
Term
What artery supplies the anterior wall?
Definition
Left anterior descending branch of the left main
Term
What chamber of the heart is most posterior?
Definition
Left atrium
Term
What is mean arterial pressure equal to?
(two different formulas)
Definition
MAP = COxTPR
MAP = 2/3diastolic+1/3 systolic
Term
What is the Fick Principle?
Definition
CO = O2 consumption/(arterial O2-venous O2)
Term
Effect of each of the following on contractility:
Catecholamines
Intracellular calcium
Intracellular sodium
pH
Hypoxia
Definition
Catecholamines: increase
INtracellular calcium INcreases
INtracellular sodium INcreases
LOW pH LOWers
LOW O2 LOWers
Term
What is a normal ejection fraction?
Definition
>55%
Term
Decrease in ejection fraction = systolic or diastolic HF?
Definition
Systolic
Term
How does resistance to flow relate to viscosity, length, and vessel radius
Definition
Resistance = viscosity*length/(radius^4)
Term
At what point in the cardiac cycle is the heart consuming the most oxygen?
Definition
During isovolumetric contraction
Term
What does S3 represent?
Definition
Increased preload like in mitral regurg or CHF
Normal in kids and pregnant women
Term
What does S4 represent?
Definition
Increased atrial pressure from pushing into stiff hypertrophied ventricle
Term
What is the order of the components of the jugular venous pulse?
Definition
A wave
C wave
X descent
V wave
Y descent
Term
What does the A wave correspond to?
Definition
atrial contraction
Term
What does the C wave correspond to?
Definition
Right ventricular contraction causing the tricuspid valve to bulge into the right atrium
Term
What does the X descent correspond to?
Definition
atrial relaxation and the downward displacement of tricuspid during ventricular contraction
Term
What does the Y descent correspond to?
Definition
blood flow from RA to RV
Term
Conditions associated with wide splitting of the 2nd heart sound?
Definition
Pulmonic stenosis, RBBB
Term
Conditions associated with fixed splitting of the 2nd heart sound
Definition
ASD
Term
Conditions associated with paradoxical splitting of the 2nd heart sound?
Definition
Aortic stenosis, LBBB
Term
Name the 4 heart auscultation areas and their locations starting from the right most
Definition
APT M
Aortic = Right parasternal 2nd intercostal space
Pulmonic = Left parasternal 2nd intercostal space
Tricuspid = Left parasternal 5th intercostal space
Mitral = Left mid clavicular 6th intercostal space
Term
What mumurs are heard best at the aortic area?
Definition
SYSTOLIC
Aortic Stensosis
Flow Murmur
Aortic Valve Sclerosis
Term
What murmurs are heard best at the pulmonic area?
Definition
SYSTOLIC
Pulmonic Stenosis
Flow murmur (e.g. ASD)
Term
What murmurs are heard best at the tricuspid area?
Definition
SYSTOLIC
Tricuspid regurg
VSD

DIASTOLIC
Tricuspid stenosis
ASD
Term
What murmurs are heard best at the Mitral area?
Definition
SYSTOLIC
Mitral regurg

DIASTOLIC
Mitral stenosis
Term
What murmurs are heard beast at the left sternal border?
Definition
SYSTOLIC
Hypertrophic Cardiomyopathy

DIASTOLIC
Aortic regurg
Pulmonic regurg
Term
Holosytolic high pitched blowing
Definition
Mitral or Tricuspid regurgitation
Term
Crescendo-decrescendo systolic
Definition
Aortic stenosis
Term
Holosystolic, harsh
Definition
VSD
Term
Late systolic crescendo
Definition
Mitral prolapse
Term
Immediate high pitched blowing diastolic
Definition
Aortic Regurg
Term
Rumbling late diastolic
Definition
Mitral stenosis
Term
Continuos machine-like
Definition
PDA
Term
Continuos machine-like
Definition
PDA
Term
Torsades de Pointes description and risk factors
Definition
V-tach, shifting sinusoidal wave forms
Increasing QT interval increases risk
Term
Congenital long QT syndromes
defect
association
other names
Definition
Defects in cardiac sodium and potassium channels
may have sensorineural deafness
Jervell and Lange-Nielsen Syndrome
Term
Treating A-fib
Definition
B-blockers
Calcium channel blockers
Digoxin
Term
Treating A-flutter
Definition
Class IA
Class IC
Class III
B-blockers
Term
Treating 3rd degree block
Definition
pacemaker
Term
Treating V-fib
Definition
CPR and deibfrillation
Term
Describe the A-fib tracing
Describe the A-flutter tracing
Definition
A-Fib: no discrete P waves with irregularly spaced QRS complexes
A-flutter: identical back-back P waves (sawtooth)
Term
Describe the various heart block tracings
Definition
1st degree: fixed, lengthened PR interval
2nd degree type1 (Wenckebach): progressive lengthening of PR interval until there is a dropped beat (P wave without QRS)
2nd degree type 2: Dropped beats not preceded by lengthening PR interval
3rd degree: No relation between P waves and QRS complexes
Term
What are the signals for ANP release and what does it do?
Definition
Released in response to increased atrial pressure.
Vascular relaxation and increased GFR (dilate afferent arteriole, constrict efferent)
Term
Contrast the aortic and carotid barorceptors
Definition
Carotid responds to any change in BP by proportionally adjusting it's firing rate on CN IX

Aortic responds only to increase in BP by increasing firing on CN X
Term
What is the Cushing reaction?
Definition
Increased ICP constricts arterioles leading to cerebral ischemia which increases systemic BP causing bradycardia.
Term
How does the heart increase it's O2 supply, why?
Definition
Vasodilation to increase blood flow since the organ is always extracting 100% of Oxygen delivered.
Term
Normal RA and RV pressure?
Definition
RA: 5 mmHg
RV: 25/5mmHg
Term
Normal PA and PCWP pressure?
Definition
PA = <25/10
PCWP = <12
Term
Normal LV and Aortic arch pressure?
Definition
LV = <130/10
Aorta = <130/90
Term
What embryologic defect causes Persistent Truncus Arteriosus
Definition
Truncus arteriosus fails to divide into pulmonary trunk and aorta
Term
What embryologic defect causes tetrology of fallot?
Definition
Anterosuperior displacement of the infundibular septum
Term
What embryologic defect causes D-transposition of the great vessels?
Definition
Failure of the aorticopulmonary septum to spiral
Term
What is TAPVR
Definition
Total anomalous pulmonary venous return
pulmonary veins drain into the right heart circulation
presents as blue baby with right to left shunt
Term
Most common congenital cardiac anomaly?
Definition
VSD
Term
Coarctation of the aorta presentation
Definition
Infantile: PDA because coarctation proximal to it
Adult: kid with HTN in upper extremities and way pulses in lower, might see notching of ribs on X-ray due to collateral circulation. Coarcation is distal to ductus arterioles
Either can result in aortic regurg
Term
PDA presentation
Definition
machine like murmur
cyanosis of the toes but not fingers
Inititally a L to R shunt but eventually get Eisenmenger syndrome (R to L)
Term
Congenital cardiac defects associated with:
DiGeorge
Definition
Truncus Arteriosus
tetrology of Fallot
arch defects
Term
Congenital cardiac defects associated with:
Down syndrome
Definition
ASD
VSD
Inferior interatrial septal defects (endocardial cushion)
Term
Congenital cardiac defects associated with:
Congenital Rubella
Definition
Septal defects
PDA
Pulmonary artery stenosis
Term
Congenital cardiac defects associated with:
Turner Syndrome
Definition
Preductal (infantile) coarctation of the Aorta
Term
Congenital cardiac defects associated with:
Marfan's Syndrome
Definition
Aortic insufficiency (adult complication)
Cystic medial necrosis leading to aortic dissection (adult complication)
Term
Congenital cardiac defects associated with:
Gestational Diabetes
Definition
Transposition of the great vessels
Term
HTN is a risk factor for which diseases
Definition
Atherosclerosis
LVH
Stroke
CHF
Renal Failure
Retinopathy
Aortic Dissection
Term
Contrast the histology of
Monckeberg
Arteriosclerosis
Atherosclerosis
Definition
Monckeberg = calcification of media usually in radial/ulnar arteries, no occlusion
Arterio = hyalinization of small arteries, onion skinning in malignant HTN
Athero = fibrous and atheromatous plaques in the intima
Term
What is the pathophysiology of developing an atheromatous plaque?
Definition
Endothelial cell dysfunction leads to macrophages and LDL accumulation.
Macrophages become foam cells causing fatty streaks.
Smooth muscle cell migration (due to PDGF and TGF-B) leads to fibrous plaque formation and complex atheromas form.
Term
What kind of vessels are affected by atherosclerosis?
What locations are most common?
Definition
Elastic arteries and large/medium sized muscular arteries
Abdominal aorta > coronary > popliteal > carotid
Term
What ECG finding separates Prinzmetal angina from stable/unstable?
Definition
ST elevation in Prinzmetal, depression in the others
Term
Coronary Steal Syndrome
Definition
Vasodilator aggravates ischemia by depriving shunting blood away from an area that is highly stenosed and towards a more healthy vessel
Term
Most likely site of MI?
Definition
LAD > RCA > Circumflex
(anterior, inferior, posterior)
Term
Pathology of an MI 0-4 hours old?
Definition
None
Term
Pathology of an MI 4-12 hours old?
Definition
Gross: white infarct, dark mottling; pale with tetrazolium stain
Microscope: early coagulative necrosis, edema, hemorrhage, wavy fibers
Term
Pathology of an MI 12-24 hours old?
Definition
Gross: white infarct, dark mottling; pale with tetrazolium stain
Microscopic: Contraction bands. Release of necrotic cell content into blood, beginning of neutrophil emigration
Term
Pathology of an MI 2-4 days old?
Definition
Gross: Hyperemia
Microscope: Extensive coagulative necrosis, tissue surrounding infarct shows acute inflammation, lots of neutrophils.
Term
Pathology of an MI 5-10 days old?
Definition
Gross: Hyperemic border, central yellow/brown softening
Microscopic: Granulation tissue at the edges
Term
Pathology of an MI 7 weeks old?
Definition
Gross: gray-white tissue with recanalized artery
Microscope: Contracted scar complete
Term
Which cardiac enzyme is positive first in an MI and when?
Definition
Troponin at 4 hours
Term
What is special about CK-MB?
Definition
Good at diagnosing reinfarction on top of acute MI
Term
During an MI, what is the difference between ST elevation and depression?
Definition
Elevation = transmural infarct
Depression = subendocardial infarct
Term
Where is the infarct and what vessel is occluded?
V1-V4
Definition
Anterior Wall
LAD
Term
Where is the infarct and what vessel is occluded?
V1-V2
Definition
Anterior septum
LAD
Term
Where is the infarct and what vessel is occluded?
V4-V6
Definition
Anterolateral Wall
Circumflex
Term
Where is the infarct and what vessel is occluded?
1, aVL
Definition
Lateral Wall
Circumflex
Term
Where is the infarct and what vessel is occluded?
2, 3, aVF
Definition
Inferior wall
Right coronary
Term
Dressler's Syndrome
Definition
autoimmune disease causing fibrinous pericarditis several weeks post MI
Term
Most common causes of dilated cardiomyopathy
Definition
ABCCCD
Alcoholism
Beri beri (wet)
Coxsackie
Chagas
Cocaine
Doxirubicin
Term
Treating hypertrophic cardiomyopathy
Definition
Beta blockers and calcium channel blockers (non-dihydropyridine like verapamil)
Term
Loffler's Syndrome
Definition
endomyocardial fibrosis (restrictive cardiomyopathy) with eosinophilic infiltrate
Term
CHF drugs that reduce mortality
Definition
ACEi/ARBs
B blockers
Spironolactone
Term
CHF drugs that improve symptoms but don't improve mortality
Definition
Thiazide/Loop diuretics
Nitrates
Term
What disease are hemosiderin filled macrophages in the lungs associated with?
Definition
Congestive Heart Failure
Term
What are Roth's Spots and what are they a sign of?
Definition
Round white spots on retina surround by hemorrhage
Bacterial endocarditis
Term
What are Osler's Nodes and what are they a sign of?
Definition
Tender raised lesion on finger or toe pads
Bacterial Endocarditis
Term
What are Janeway lesions and what are they associated with?
Definition
Small erythematous lesions on palm or sole
Bacterial endocarditis
Term
What are splinter hemorrhages associated with?
Definition
Bacterial endocarditis
Term
What bacteria is associated with bacterial endocarditis of colon cancer?
Definition
Strep Bovis
Term
What bacteria is associated with endocarditis seen in prosthetic valves?
Definition
S. Epidermidis
Term
Which bugs are more likely to be found in right sided bacterial endocarditis?
Definition
S. Aureus
Pseudomonas
Candida
Term
Complications of bacterial endocarditis
Definition
Chordae rupture
Glomerulonephritis
Suppurative pericarditis
Emboli
Term
What is the antibody target in acute rheumatic fever?
Definition
M protein
Term
Common causes of Serous pericarditis
Definition
noninfectious inflammatory diseases
Term
Conditions that cause Pulsus Paradoxus
Definition
Cardiac Tamponade/Pericarditis
Asthma/Croup
Obstructive Sleep Apnea
Term
Syphilitic heart disease findings
Underlying pathophys
Definition
Ascending aorta/arch aneurysm
aortic insufficiency
tree bark appearance

disruption of the vasa vasorum of the aorta
Term
What is Kussmaul's Sign?
What is it associated with?
Definition
Increase in JVP on inspiration
Heart tumors
Term
Most common heart tumor
Definition
Melanoma or Lymphoma met
Term
Most common location for primary heart tumor
Definition
Left atrium (90% in atrium)
Term
Most common presentation for primary heart tumor
Most common radiology finding
Definition
Multiple syncopal episodes
Ball-valve obstruction
Term
Difference between Raynaud's Disease vs. Raynaud's Phenomenon?
Definition
Phenomenon is when it is secondary to connective tissue disease
Term
Giant cell arteritis
presentation
Definition
Old lady with headache, jaw claudication, and polymyalgia rheumatica
Term
Giant cell arteritis pathology
Definition
granulomas, increased ESR, palpable arteries
Term
Takayasu arteritis presentation
Definition
Asian female under 40
weak upper extremity pulses, fever, night sweats, arthritis, myalgia, skin nodules, ocular disturbance
Term
Takaysu's arteritis pathology
Definition
Granulomas in the aortic arch and proximal vessels
increased ESR
Term
Polyarteritis Nodosa
presentation
Definition
Young adults, often have HBV too
Fever, weight loss, abdominal pain, melena, HTN, CNS problems and CUTANEOUS ERUPTIONS
Term
Polyarteritis pathology
Definition
SPARES LUNGS
usually renal and visceral
Transmural fibrinoid necrosis with lesions of different ages
Multiple aneurysms and constrictions
immune complexes
Term
Kawasaki presentation
Definition
Asian kids <4
fever, lymphadenitis, conjuctivitis, strawberry tongue, hand/foot erythema and desquamation
Term
Kawasaki pathology
Definition
be wary of coronary aneurysms
Term
Buerger's disease presentation
Definition
Male smoker < 40
Claudication/gangrene and Raynaud's
Term
Buerger's pathology
Definition
Segmental thrombosin vasculitis
improves with smoking cessation
Term
Microscopic polyangiitis presentation
Definition
palpable purpura
pauci-immune glomerulonephritis
Term
microscopic polyangitiis pathology
Definition
p-ANCA
NO granulomas
Term
Wegener's presentation
Definition
Nasal septum issues, sinusitis, otitis media and mastoiditis
hemoptysis, cough, dyspnea
hematuria with RBC casts
Term
Wegener's pathology
Definition
Granulomas
focal necrotizing vasculitis
c-ANCA
large nodular densities on x-ray
Term
Churg-Strauss presentation
Definition
Asthma, wrist/foot drop
sinusitis, palpable purpura
Term
Churg-strauss pathology
Definition
eosinophilia and granulomas
p-ANCA
Term
Henoch-Schonlein presentation
Definition
kids who after a URI get palpable purpura on butt/legs, arthralgias, and GI pain/melena
Term
Henoch-Schonlein pathology
Definition
IgA complexes, IgA nephropathy
Multiple GI lesions of the same age
Term
Sturge-Weber presentation
Definition
port-wine stain on face, seizures, early glaucoma, leptomeningieal angiomatosis
Term
Sturge-Weber pathology
Definition
intracerebral AVMs
only affects very small vessels
Term
Strawberry Hemangioma
Definition
Benign capillary hemangioma in infants that regresses by age 5-8
Term
Cherry hemangioma
Definition
Benign capillary hemangioma that appears in 20s or 30s, see more of them with age
Term
Pyogenic Hemangioma
Definition
Polypoid capillary hemangioma that ulcerates and bleeds
associated with trauma and pregnancy
Term
Cystic Hemangioma
Definition
Associated with Turner syndrome
cavernous lymphangioma in the neck
Term
Glomus tumor
Definition
Benign, painful, reddish blue tumor under nail beds
Comes from muscular capillaries designed to shunt blood away when it's cold
Term
Bacillary angiomatosis
Definition
Papules in AIDS patients infected with Bartonella Henselae (cat scratch fever)
looks like Kaposi's Sarcoma
Term
Angiosarcoma
Definition
Liver cancer associated with vinyl chloride, arsenic and ThO2 (old x-ray contrast agent)
Term
Lymphangiosarcoma
Definition
lymphatic cancer associated with persistent lymphedema (e.g. post-mastectomy)
Term
Kaposi' Sarcoma
Definition
endothelial cancer in AIDS patients with HHV8 infection
looks like bacillary angiomatosis
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