Patho Week 8

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Heart Sounds:

* closure of the mitral and tricuspid valves
S1
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Heart sounds:

closure of the aortic and pulmonic valves
S2
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* Slight delay in the valve closure, with the aorta closing first and the pulmonary valve
S2 split
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* As blood flows rapidly from the atria into the ventricles, the vibrations of the blood flow against the ventricular wall can be heard as a third heart sound.
* Gallops
* This can be a normal sound in children and young adults, but in older adults it can indicate decreased ventricular muscle elasticity
* Heart failure
S3
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* When the left atrium contracts against a noncompliant, stiff left ventricle. Low pitched sound, best heard with the bell piece of the stethoscope.
* Associated with hypertension, because long-term hypertension causes left ventricular hypertrophy that creates a noncompliant, stiff left ventricle
* LVH due to hypertension
S4
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fifth intercostal space, left midclavicular line
mitral valve
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second intercostal space, right sternal border
aortic valve
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* Innocent or functional heart murmurs, may be heard in states of high blood flow within the heart.
* These heart murmurs are usually faint, and intermittent, occur in a small area of the chest, and usually do not cause symptoms.
physiologic murmurs
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Murmurs caused by anxiety, stress, fever, anemia, overactive thyroid, and pregnancy
physiologic murmurs
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* Sounds caused by abnormalities of the heart that include valvular deformities, valvular dysfunction, and heart wall defects.
* Can cause heart failure
* Require medical intervention to prevent complications
pathologic murmur
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Symptoms include:

shortness of breath, dizziness, chest pains, or palpitations
pathologic murmurs
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Grades of heart murmur:

* Very faint, heard only after listener has “tuned in”; may not be heard in all positions.
grade 1
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Grades of heart murmur;

* Quiet, but heard immediately after placing the stethoscope on the chest.
grade 2
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Grades of heart murmur;

* moderately loud
grade 3
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Grades of a heart murmur:

loud with a palpable thrill
grade 4
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grades of a heart murmur:

very loud, with thrill. May be heard when stethoscope is partly off the chest wall.
grade 5
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Grades of a heart murmur:

* Very loud, with thrill. May be heard with stethoscope off the chest wall.
grade 6
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Common causes of _____________ include:

* Rheumatic fever
* Associated with aging, atherosclerosis
* Few symptoms
mitral stenosis
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Common causes of _____________ include:

* RHD
* Endocarditis
* Marfan’s syndrome
* Ankylosing spondylitis
aortic insuffieciency
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Common causes of _____________ include:

* Aortic sclerosis
* RHD
* Congenital valve defect
aortic stenosis
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Common causes of _____________ include:

* MI
* Mitral valve prolapse (MVP)
* Mild, asymptomatic
* Rheumatic heart disease
* Infective endocarditis
* Drugs
* Myxomatous degeneration
* Mitral annular calcifications
* Marfan’s and Ehlers-Danlos syndromes
mitral insufficiency
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Common causes of _____________ include:

Myxomatous degeneration
Mitral valve prolapse
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Used to diagnose valve disorders:

* Noninvasive, transducer placed on chest wall
transthoracic echocardiography
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Used to diagnose valve disorders:

* Transducer inserted into esophagus
* More sensitive than TTE
* transesophageal echocardiography
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Used to diagnose valve disorders:

* Sound waves to measure velocity of blood flow across valves and in chambers; can be colorized
doppler echocardiography
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Medical treatment for valve disorders:

* Medications that is responsible for vasodilation, reducing ischemic chest pain
nitrates
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Medical treatment for valve disorders:

* Medications that is responsible for decreasing HR, and peripheral resisitance
beta-adrenergic blockers
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Medical treatment for valve disorders:

* Medications that reduce clot risk
anticoagulants
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Medical treatment for valve disorders:

* Medications that reduce blood volume overload
diuretics
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Medical treatment for valve disorders:

* Prophylactic may be needed
* Deformed or artificial valves can act as a site for bacterial growth if a patient develops bacteremia
* Recommended whenever patients 
* undergo dental treatment 
* other invasive procedures (including insertion of an IV)
antibiotics
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Surgical treatments for valve disorders:

* Valv____
* Valv____
* Valve ______
* ______ heart
* Invasive _______
otomy, uloplasty, replacement, open, percutaneous
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Why some patients would need prophylactic-antibiotic treatment?

* ______ or artificial valves can act as a site for bacterial growth if a patient develops _______
* Recommended whenever patients 
* undergo _______ treatment 
* other _______ procedures (including insertion of an IV)
deformed, bacteremia, dental, invasive
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Risks vs Benefits of a _______ valve:

* ______ risk of clot formation
* _______ therapy needed
* Last ______
mechanical, increased, anticoagulant, longer
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Risk vs Benefit of a ________ valve:

* Porcine, _______, or human cadaver
* Less _______
* 30% of patients need to ______ after 10 years
* ___% need a replacement after 15 years 
bioprosthetic, bovine, durable, replace, 50
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Patho of Mitral Stenosis:

*  _____ blood flow from left into ____ ventricle
impedes, atria, left
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Characteristics of Mitral Stenosis;

* Murmur at the apex→_____: Low pitched _____, left lateral decubitus position accentuates the murmur
* Opening _____: rigid mitral valve opening
* _____ cardiac output as less blood flows into left _______
* _____ of left ____ as blood can not enter left ventricle
diastolic, rumble, snap, decreased, ventricle, overload, atria
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Symptoms of Mitral Stenosis:

* pulmonary ______
* _______ with exertion,
* paroxysmal ______ dyspnea,
* orthopnea
edema, dyspnea, nocturnal
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Risks of Mitral Stenosis:

* Increased risk of ______ fibrillation and stroke
atrial
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Commonality of mitral stenosis:
very common
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Patho for Aortic stenosis:

* Aortic sclerosis=________ of the ______ valve in the elderly
calcification, aortic
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Characteristics of Aortic Stenosis:

* Difficult for ___ ventricle to eject blood due to increased ____, leading to __ __ ___
* Murmur: 
* As the ventricle contracts (during systole), blood flows through the narrowed valve
* ______, crescendo and low-pitched
* _______ intercostal space with patient seated and leaning forward
* Systolic ______ may be present
left, resistance, LVH, systolic, second, thrill
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Symptoms of Aortic stenosis:

* _______ dyspnea
* Pulmonary ______ as blood backs up LV to LA to the pulmonary circulation
* Angina ____ due to poor oxygenation of _____
exertional, edema, pectoris, LVH
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Risks of Aortic stenosis:
valve replacement
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Commonality of aortic stenosis:
very common
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Patho of mitral insufficiency:

* Mitral valve does not ____ properly
close
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Characteristics of Mitral Insufficiency:

* Murmur: ________ murmur heard at apex that radiates into ________
* Portion of blood moves from left ________ into left atria
* ________ blood for ________ circulation
* Post-____ due to papillary muscle damage
holosystolic, axilla, ventricle, decreased, coronary, MI
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Symptoms of Mitral Insufficiency:

* Often _________→assess post MI with echocardiography
* Diminished ____
* Pulmonary symptoms due to fluid back up in the lungs
* Severe chest _____
asymptomatic, S1, pain
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Risks of Mitral Insufficiency:
afib and heart failure
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Commonality of mitral insufficiency:
very rare
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Patho of aortic insufficiency:

* Deformed aortic valve does not ____ properly
* Backflow of blood from aorta into ___
* Dilation and decreased _______ of LV
* Backup of blood into _______ circulation
close, LV, contraction, pulmonary
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Characteristics of aortic insufficiency:

* Austin Flint murmur
* LV impulse _____ through the chest wall
* Murmur: high-pitched, blowing, _____ ______ murmur
visible, decrescendo, diastolic
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Patho Hypertrophic Cardiomyopathy;

* The ________ septum of the ___ enlarged
* Asymmetric vs concentric ______ seen in LVH in response to ______
* Inhibits _______ of LV blood
interventricular, LV, enlargement, HTN, ejection
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Characteristics of Hypertrophic cardiomyopathy:

* ______ disorder
* Enlarged LV compromises the functioning of aortic and mitral ______
* Murmur
* Diamond-shaped ______ murmur
genetic, valves, systolic
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Risks of Hypertrophic cardiomyopathy:

* atrial and ventricular ________
* Atrial fibrillation
* ______
* Non-sustained ventricular _______
* Sudden ______ due to ventricular dysrhythmias
dysthymias, PVCs, tachycardia, death
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Commonality of hypertrophic cardiomyopathy:
rare
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Patho of Mitral Valve Prolapse:

* AKA Barlow syndrome, _____ valve syndrome
* Females: age 14 to 30 years; relatively _______
* Commonly __________ with unknown cause
* Myxomatous degeneration of the valve tissues cause _____ closure, as leaflet(s) prolapse upward into LA
* Mid-systolic click may be present followed by ________ murmur
floppy, common, asymptomatic, poor, systolic
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* MVP Syndrome:
* Benign MVP with sporadic episodes of prolapse of _____
* Patient may describe dizziness, palpitations, atypical chest ____, anxiety
leaflet, pain
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Expected treatment of MVP
doesn’t require treatment
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Pulmonary stenosis;

* ______ of valve
* Increased workload on ____ ventricle
* May cause right ventricle ______


* Murmur
* Harsh, ____ crescendo-decrescendo in ___ intercostal space on sternal border
narrowing, right, failure, systolic, 2nd
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Treatment of pulmonary stenosis
percutaneous balloon valvotomy
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Pulmonic Insufficiency:

* _____ does not close properly
* _______ of right ventricle
* Signs of right-side heart ______ may appear
* Commonly secondary to pulmonary ______
* Other causes: congenital heart disease, RHD, and endocarditis
* Murmur
* Graham Steell murmur; high-pitched, decrescendo _________ murmur
valve, overload, failure, HTN, diastolic
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Treatment of pulmonic insufficency
valve replacement
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Risk factors for tricuspid stenosis;

* _________ventricle infarction
* _________ heart disease
* Infective Endocarditis
* Pulmonary _________
right, rheumatic, HTN
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Greatest risk factor for developing HF:
hypertension
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A weakened ventricular muscle that is unable to sufficiently pump blood into the arterial circulation to meet the needs of the tissues.
heart failure
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Pre-existing Heart Conditions:
MI, CAD, metabolic syndrome, DM
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* Women are often diagnosed with HF at an _____ age than men because natural _____ is cardio-protective
* After menopause, the risk of cardiovascular disease for men and women is ______
* Greater prevalence of HF among people of ______ origin compared with people of European origin
older, estrogen, equal, african
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* Amount heart is filled per beat
* Increased EDV leads to increased SV
* Volume of blood in ventricles at end of diastole
* Increased in - Hypovolemia regurgitation of cardiac valves Heart Failure
preload
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* Resistance that heart pumps against
* Increased afterload reduces cardiac output
* Resistance left ventricle must overcome to circulate blood
* Increased in-people with HTn vasoconstriction
afterload
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increase in afterload=
increase in cardiac workload
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Effects on the heart:

* Force of contraction
* Ca++ and SNS activation
* Positive _______ agents
* Digitalis
* Positive _______ agent
inotropic
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Effects on the heart:

* Rate of heart
* Digitalis and beta blockers
* Negative ______ effect
* Epinephrine and SNS activation
* Positive _______ effect
chronotropic
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Four Major pathologic:

* Increased _____ volume or volume overload
* Impaired _______ filling
* _________ of ventricular muscle
* _________ ventricular contractile function
fluid, ventricular, degeneration, decreased
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* ____ sided heart failure due to pulmonary issues
* COPD-→hypoxia-→pulmonary vasoconstriction-→____ workload on ____ side of heart
right, hypoxia, increased, right
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List the seven causes of heart failure
cardiomyopathies, dysthymias, cardiac infection, PE, heart valve abnormalities, mitral regurgitation (insufficiency), aortic stenosis
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Causes of HF:

Cardiomyopathies:
ischemia, dilated, restrictive, hypertrophic
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Myocardial fibrosis and scarring of heart
ischemic cardiomyopathy
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Enlargement of ventricles
dilated cardiomyopathies
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HF:

* can not fill
restrictive cardiomyopathies
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* Usually LV muscle enlarged, encroaches on ejection of blood into aorta
* Primary: genetic
* Secondary: due to HTN
hypertrophic cardiomyopathies
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Causes of HF:

* Irregular heart rhythm may precipitate failure
* Both tachyarrhythmias and bradyarrhythmia
dysrhythmia
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Causes of HF:

* Endocarditis, myocarditis
cardiac infection
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Causes of HF:

Acute RV failure due to increased pulmonary artery pressure
pulmonary embolism
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Causes of HF:

* May occur after transmural LV MI
* Valve does not close properly, backward flow into right atrium (decreased blood ejected from LV)
mitral regurgitation
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Causes of HF:

* LV must generate more pressure to eject blood


* LVH develops
aortic stenosis
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* When the body's need for blood is unusually high
* Heart failure symptoms happen even though the heart is working well
* Heart output can not meet high circulatory needs
* Relatively uncommon
* Thyrotoxicosis, severe anemia
high output
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* When the heart cannot keep up with the normal demands of the body
* Weakened heart muscle
* Typical heart failure
low output
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What kind of Heart Failure;

* Difficulty ejecting blood
* Decreased stroke volume and cardiac output
* Activation of RAAS, SNS, vasoconstriction place more stress on heart
* Backup of fluid from failed ventricle
systolic
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What kind of heart failure?

* Difficulty relaxing/filling
* Stiff or enlarged ventricles can not easily fill
* EF may be normal (due to reduced EDV)
diastolic
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Symptoms of _______ sided heart failure:

* JVD 
* Ascites
* Gastrointestinal disturbances caused by venous congestion
* Hepatojugular reflux 
* Hepatomegaly 
* Splenomegaly  
* Peripheral edema- ankle or sacral edema; fingers, feet
right
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Symptoms of _______ sided heart failure:

* Dyspnea 
* Cough 
* Orthopnea
* PND 
* Weak peripheral pulses 
* Decreased cerebral perfusion; confusion, disorientation 
left
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Forward effects of Left sided heart failure:
decrease perfusion, activate SNS, RAAS
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Backward effects of Left sided heart failure:

* ______ pressure backup into _______ circulation
* ______, orthopnea, paroxysmal nocturnal dyspnea (_)
hydrostatic, pulmonary, crackles, PND
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Backward effects of right sided heart failure:

*  most significant
* _____: jugular vein distention
* Increased central ______ pressure (CVP)
* Hepato_____, splenomegaly, ascites
* Hepatojugular reflex may be present
* Venous congestion of _____ tract causing anorexia, nausea
* Hypoxia and cyanosis may develop
* Peripheral edema
JVD, venous, megaly, GI
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Forward effects of right sided heart failure
weakness and fatigue
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Implications of heart sounds:

* High ventricular volume and pressure
S3
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Implications of heart sounds:

* atrium contracting against noncompliant ventricle
S4
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The repeated simulation of the ____ increases the risk of ______. Imbalances in serum electrolytes, particularly potassium, can have adverse effects on ______ function. Hypokalemia predisposes the heart to _____. In heart failure, serum electrolytes require periodic _______ and correction if abnormal.
RAAS, hypokalemia, myocardial, dysrhythmias, monitoring
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Medication that:

* Block angiotensin-converting enzyme
* Cornerstone of heart failure treatment
ACE inhibitors
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Medication that is often used in those who can’t tolerate ACE inhibitors
angiotensin II receptor blocker