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77 Cards in this Set
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secundum type ASD
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most common type of asd
caused by excessive resorption of the septum primum or reduced size of septum secundum or both, causing an opening btwn the L & r atria defect is in the center of the atrial septum at the foramen ovale normal av vlaves abx prophy is not needed most clinically signifiant ASD small defect = sx may be delayed as late as age 30 |
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foramen ovale
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fetal communication btwn r & l atria
remains normally patent in 25% of adults but paradoxical emboli may pass through a large patent FO |
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premature FO closure
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occurs during prenatal life
r heart is hypertrophied while l heart is underdeveloped |
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most common congenital cardiac anomaly
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vsd
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l-> r shunt sx
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excessive fatigue upon exertion
not cyanotic but causes marked proliferation of the tunica intima & media of the pulmonary arteries & arterioles. eventually pulmonary resistance > systemic, & shunt reversal occurs (eisenmenger complex) causing late cyanosis |
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transposition of great vessels
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AP septum fails to develop in a spiral fashion
aorta on rv & pulmonary trunk on lv r-> l shunting & cyanosis infants that are born alive must have other defects that allow mixing of oxygenated & deoxygenated blood |
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tetralogy of fallot
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most common cyanotic congenital heart dz in older kids & adults
associated w. downs ap setum doesn't properly align pulmonary stenosis overriding aorta IV septal defect rvh r-> l shunting w. early cyanosis that's usually present at birth most common cyanotic congenital cardiac anomaly |
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persistant truncus arteriosus
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only partial development of AP setum
only 1 large vessel leaves the heart & gets blood from both the rv & lv r-> shunting w. cyanosis always accompanied by membranous ventricular septal defect |
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O2 saturation in fetal circulation
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highest = umbilical vein
lowest = ductus arteriosus |
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fetal circulation bypass
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ductus venosus = allows bypass of the liver
FO + ductus arteriosus = bypass of the lungs |
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causes of sustain ductus arteriosus patency
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PGE
intrauterine/neonatal asphyxia |
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PDA
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common in preemies & maternal rubella infection
causes l-> r shunting |
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IVC passage through diaphragm
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caval hiatus @ t8
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esophageal passage through diaphragm
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esophageal hiatus @ t10
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aortic passage through diaphragm
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aortic hiatus @ t12
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what does lca supply
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lv
la anterior part of the IV septum |
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common systolic valvular defects
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mitral insufficiency
aortic stenosis |
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common diastolic vavlular defects
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mitral stenosis
aortic insufficiency |
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valve position during systole
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mitral closed
aortic open |
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valve position during diastol
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mitral open
aortic closed |
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artery & nerve damage in humerus surgical neck fracture
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laceration of posterior humeral circumflex artery
axillary nerve lesion |
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artery & nerve damage in humerus midshaft fracture
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laceration of profunda brachii artery
radial nerve lesion |
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artery & nerve damage in humerus supracondylar fracture
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laceration of brachial artery
median nerve lesion |
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artery & nerve damage in medial epicondyle fracture
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superior ulnar collateral artery
ulnar nerve lesion |
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source of colateral circulation around the axillary artery
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subscapular artery anastamoses w. suprascapular artery
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artery & nerve damaged in anterior compartment syndrome of the leg
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anterior tibial artery
deep fibular nerve |
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artery & nerve damaged in posterior compartment syndrome of the leg
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posterior tibial artery
tibial nerve |
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areas supplied by deep femoral artery
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anterior & posterior thigh
shaft of femur |
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major source of blood supply to femur head
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medial circumflex artery
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aortic stenosis
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diff in systolic lv & aortic pressure
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murmur of aortic stenosis
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crescendo decrescendo systolic
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aortic regurgitation
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diastolic aortic decreases rapidly as blood flows back into ventricle
ventricular diastolic pressure is elevated |
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murmur of aortic regurgitation
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diastolic
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mitral stenosis
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diff in diastolic LV pressure & la pressure during filling
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murmur of mitral stenosis
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diastolic
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mitral regurgitation
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incompentent valve allows backflow into la during ventricular systole
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murmur of mitral regurgitation
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systolic
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perfusion limited exchange
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low capillary velocity still allows adequate time for diffusion
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diffusion limited exchange
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capillary velocity remains high
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congenital anomaly of fetal alcohol syndrome
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vsd
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congenital anomaly of maternal rubella
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exposure at 5th-10th wk can cause PDA, ASD & VSD
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effect of l->r shunt
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chronic rhf
secondary pulmonary htn |
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effect of r->l shunt
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bypasses the lungs, producing a cyanosis as early as birth
paradoxical embolism in which dvt causes sytemic infarct |
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6 types of l->r shunts
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vsd
asd complete endocardial cushion defect sinus venosus patent FO PDA |
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3 types of r->l shunts
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tetralogy of fallot
transposition of great vessels persistent truncus arteriosus |
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complete endocardial cushion defect
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asd + vsd + a common atrioventricular valve
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sinus venosus
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defect in the upper part of the atrial septum
may cause anomalous pulmonary venous return into the svc or ra |
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primum type ASD
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defect in lower atrial septum above av vlaves
associated w. anomaly of av vlaves requires abx prophy for invasive procedures |
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preductal/infantile coarctation of the aorta
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narrowing proximal to the opening of the ductus arteriosus
reversal of flow in intercostal arteries causes rib notching |
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postductal/adult coarctation of the aorta
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narrowing distal to the opening of the ductus arteriosus
most common type, allows survival into adulthood diff pressures in UE & LE |
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congenital pulmonic valve stenosis/atresia
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unequal division of the truncus arteriosus so that the pulmonary trunk has no lumen or opening at the level of the pulmonary valve
may cause cyanosis if severe |
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congenital aortic valve stenosis/atresia
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complete atresia is incompatible w. life
bicuspid aortic valves are asymptomatic, can lead to infective endocarditis, lv overload or sudden death. these valves calcify in the 5th/6th decade. #1 cause of aortic stenosis |
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heart defect associated w. marfan's
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1/3 have aortic dilation & incompetence, aortic dissection & asd
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heart defect associated w. down's
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20% have congenital cv dz
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heart defect associated w. turner's
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coarctation of the aorta
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heart defect associated w. 22q11 (digeorge's)
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truncus arteriosus
tetralogy of fallot |
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heart defect associated w. congenital rubella
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septal defects
PDA pulmonary artery stenosis |
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heart defect associated w. maternal diabetes
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transposition of great vessels
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how many days post-mi does wall/papillary muscle rupture occur
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3-7
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2 vessels used for coronary artery bypass
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saphenous vein
internal mammary artery |
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change in myocardium 1hr post MI
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no gross changes seen
intracellular edema |
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change in myocardium 6-12hr post MI
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no gross changes seen
wavy myocardial fibers vacuolar degeneration contraction band necrosis beginning of neutrophil infiltration |
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change in myocardium 12-24hr post MI
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grossly pale, cyanotic & edematous
wavy myocardial fibers vacuolar degeneration contraction band necrosis beginning of neutrophil infiltration |
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change in myocardium 24-48hr post MI
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area of infarct is well demarcated soft & pale
neutrophil infiltrate cytoplasmic eosinophilia coagulative necrosis |
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change in myocardium 3-10days post MI
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infarct becomes soft, yellow & surrounded by hyperemic rim
monocyte infiltrate predominates at 72hrs |
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change in myocardium 2wks post MI
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infarct area is surrounded by granulation tissue that's gradually replaced by scar tissue
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5 major jones criteria
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migratory polyarthritis
erythema marginatum sydenham chorea subcutaneous nodules carditis |
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rheumatic heart disease
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repeated bouts of endocarditis & inflammatory insult lead to scarring & thickening of the valve leaflets w. nodules along lines of closure
mitral valve most commonly affected w. fibrosis & deformity causing fish mouth stenosis. mitral + aortic = #2 LA dilation mural thrombi rvh predisposed to infective endocarditis |
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nutmeg liver occurs in which type of heart failure
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rhf
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acute endocarditis
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high virulence organisms like s. aureus & strep
affects previously normal valves tricuspid often involved in iv drug users vegetation may form myocardial abscesses, septic emboli or cause valve destruction which results in insufficiency high fever w. chills |
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subacute bacterial endocarditis
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low virulence organisms, strep viridans, s. epidermidis, g(-) bacilli
candida is associated w. indwelling vascular catheters affects previously abnormal valves more insidious onset (+) blood bulture fatigue, lowe grade fever w.o chills, splinter hemorrhages |
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nonbacterial thrombotic endocarditis
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associated w. chronic illness
mitral valve most commonly affective sterile small vegetations are loosely adhered along the lines of closure may embolize & provide a nidus for infective endocarditis |
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libman sacks endocarditis
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nonbacterial verrucous endocarditis
mitral & tricuspid valvulitis in pt w. SLE small warty vegetations are found on both sides of valve leaflets doesn't embolize |
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myocarditis
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dilation & hypertrophy of all 4 chambers
diffuse patchy hemorrhage peripheral edema |
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cellular infiltrate in bacterial myocarditis
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neutrophil
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cellular infiltrate in viral myocarditis
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mononuclear
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cellular infiltrate in fiedler myocarditis
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eosinophils
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