LECTURE 3 Flashcards
What are the manifestations of Rheumatic Fever?
- Subarthritis
- Erythema Annulare (Marginatum)
- Subcutaneous Nodules
- Sydenham’s Chorea
What is Subarthritis associated with Rheumatic Fever?
Inflammation of the joints that are warm, painful and symmetrical occurs in one joint area for 2-5 days, then spontaneously subsides
- goes to ankles, then knees, then hands, then wrist
Arthritis that moves around associated with Rheumatic Fever is known as _______
Migratory Arthritis
= No destruction of joint (does not leave any consequences)
What is “Erythema Annulare (marginatum)” associated with Rheumatic Fever?
VASCULITIS of a circular erythema - sign of vasculitis
“Common with RF” Very RARE in REAL medical practice
What are Subcutaneous Nodules associated with Rheumatic Fever?
Knuckle region (common with RF), but RARE in real practice
What is Sydenham’s Chorea associated with Rheumatic Fever
Inability to draw straight line, involuntary jerking. Curable, mild vasculitis of cerebral vessels
- Atrophy of the midbrain (stria nuclei)
What are the differences between Huntington’s Disease chorea and Sydenham’s chorea?
Huntington’s is genetic primary disease, begins at 30-35, male and female equally - INCURABLE
- Death in 10-15 years
What are the main points of Sydenham’s Chorea?
Acquired, secondary to RF, mild vasculitis of cerebral vessels
- neurons NOT affected
- Develops in FEMALES no later than 15 y.o.
- CURABLE
What are the different types of inflammation associated with Rheumatic Fever?
- Rheumatic Myocarditis
- Rheumatic Pericarditis
- Rheumatic Endocarditis
What is Rheumatic Myocarditis associated with Rheumatic Fever?
90% of cases develops myocarditis - Inflammation of heart muscles - muscle is always involved in a form of inflammation
What is Rheumatic Myocarditis manifested by?
Necrosis of Aschoff’s Nodes -> Fibrinoid Necrosis -> Pathognomic sign of RF
What is Rheumatic Pericarditis?
Accumulation of exudate (formed by fibrinogen inflammation) in the area - can be fibrous due to fibrin strands causing friction
- Can cause issue in heart function and bruits will be heard
Rheumatic Pericarditis is what type of inflammation?
Fibrinous Inflammation
What is Rheumatic Endocarditis?
Major problem with RF
- Inflammation of VALVES
- Mitral Valve MC affected
Cardiac valves that regulate blood flow in the heart are made of ______
Endocarditis —> Inflammation of valves
With Endocarditis, what can happen simultaneously?
Both valvular insufficiency and stenosis can occur simultaneously - degree of involvement varies - both usually develop at the same time
What is Valvular Insufficiency aka Valvular Regurgitation?
When there is inflammation in the endocarditis, there is inflammation of the valves as well
- Healing with CT on out layers of the valves, the valves shrink, and forms gaps/defects between the flaps of the valve
Can the Mitral valve close completely with Valvular insufficiency aka valvular regurgitation?
No the Mitral valve cannot close completely -> left ventricular systole, blood backflows into the left atrium - in each cycle, there is more blood in the left atrium that there should be
What type of stenosis is seen with Rheumatic Fever?
Stenosis of the Atrio-Ventricular opening (Mitral stenosis)
What do the valves try to do in Mitral Stenosis?
They try to compensate by adhering portions that are not gapped together, this decreases the space of the lumen that was available for blood to flow through
When stenosis of the Mitral Valve occurs, what will this lead to?
This decreases the amount of fluid allowed to flow through the space (stenosis), therefore blood from the left atrium is not allowed to flow out
What happens when blood from the left atrium is not allowed to flow out?
Left atrium accumulates more and more blood which leads to distension of the left atrium, and leads to concentric hypertrophy of the left atrium
Accumulation of fluid in the left atrium leads to _____
Increased hydrostatic pressure, and accumulation of blood leads to the equalization of the hydrostatic pressure in the pulmonary vein and left atrium
What can hydrostatic pressure in the pulmonary vein and left atrium lead to?
Stoppage of blood in the system of the pulmonary artery = Enlargement of plaques
What can stenosis do to blood flow?
Leads to serious impairment of the blood flow -> affects the entire body
If stenosis is more than insufficiency _____
Diagnose as STENOSIS, if insufficiency is more than stenosis, diagnose as INSUFFICIENCY
What Can enlargement of any portion of the heart affect?
The trachea, bronchi, esophagus, Recurrent nerve, and cartilage rings
Hydrostatic pressure of the left atrium becomes so strong due to enlargement, what happens?
Leads to Change of position of the bronchi, which leads to cartilage rings jamming
What does squishing of the Recurrent nerve cause?
Hoarsening of the voice
What will a patient present with, if they have an enlarged atrium pressing on recurrent nerve?
Problem with blood circulation in addition to the common cold and hoarseness
How will enlargement of the heart create pressure on the esophagus?
It is typically vertical and is located behind the left atrium, enlargement of the left atrium compresses the esophagus and becomes curved
How would you determine if the esophagus is curved?
Through the use of radio plaque fluid that shows the deviation on X-ray
How do you determine the amount the atrium has enlarged in regard to the esophagus?
Measure the radius of the circumference of the heart (arc) - more dramatic enlargement of left atrium - will push the esophagus more posteriorly
- The shorter the radial deviation, the larger the atrial enlargement
Degree of radius determines the degree of enlargement of the _____
Left Atrium
Modification of blood flow =
Intracardiac Hemodynamics (movement of blood in the heart)
The significance of mitral stenosis indicates the rate of blood flow moving and _______
Speed of expelling in the right atrium is less than normal
What does Narrowing of the right AV opening cause?
Move blood from atrium to ventricle at a slower speed (less than normal)
- The blood within the left atrium flows at a slower speed
The reduction in the speed of blood flow during AV stenosis predisposes people to what?
Allows for thrombus formation (slower blood flow results in thrombi formation)
- Predisposing factor for thrombi formation
What is a physical manifestation of Mitral stenosis?
Formation of lines of Zahn (light = fibrin, dark = RBCs)
What is a thromboembolism?
Large portions of the thrombocytes may tear from body and flow through the heart
What happens in the case of a thromboembolism (what is the path)?
It can block the mitral opening/valve = death
*** BALL VALVE THROMBUS
Where can a “Ball-Valve” Thrombus form?
Left atrium - left ventricle - aorta - organs well supplied with blood (coronary arterty of heart, brain, spleen, kidney, etc)
What can Thromboembolism result in?
Blood pressure increase - dilation of heart chambers - decrease in contraction - BP decreases - blood comes back and prevent blood backflow in the ventricle - effects diastolic BP - increased resistance to systemic flow - increase in blood pushed into the coronary artery
What can an infract of the brain or heart lead to ?
STROKE
What can happen in the result of Strep Throat?
Strep throat that is not treated can result in the formation of rheumatic fever -> mitral stenosis -> thrombi -> thromboemboli-> DEATH
What is the surgery for Acquired Heart Disease?
Mitral Commissurotomy
What is Mitral Commissurotomy?
Tool can destroy the adhesion during the expansion (can’t only use fingers)
What is the 2nd most involved valve in Rheumatoid Fever?
Aortic Valve Stenosis
What is the (long) pathway of Aortic Valve Stenosis?
Narrowing of AV - atrophy - calcification stenosis - increased resistance - dramatic thickening of the ventricular wall due to the increased resistance - hypertrophy of ventricles - dilation of the ventricle - during systole, not all blood is expelled - blood remains in ventricle - more and more remains, more and more expansion , more and more cells die
What does hypertrophy of left ventricle result in?
Results in deviation of the heart to the left beyond the medial clavicular line - can result in HEART FAILURE
What does AV stenosis cause?
Left ventricular hypertrophy
What happens with Heart disease in Hypertension II?
Dramatic enlargement of the thickness of the wall - in hypertension there is no remaining blood in the ventricle
What is the exact process of Aortic valve insufficiency?
Characterized by disruption of cusps, resulting in the complete closure of the semilunar valves causing blood to backflow during diastole without any restriction
Normally the Aortic Valve does what?
Blocks the back flow - accounts for diastolic pressure - diastolic pressure is hallow or absent (normal systolic, low/absent diastolic)
What physiologically normally happens when the AV valve insufficiency happens?
- Increased systolic blood pressure
- Decreased/absent diastolic blood pressure
- Pulse pressure is equal to the systolic pressure (PP = SP - DP) since no diastolic
How would you diagnose Rheumatic Heart DIsease (aortic valve insufficiency) ?
Place stethoscope in cubital artery and listen for heart sounds - if you hear clicks and/or rubs it is an absolute indication of aortic valve insufficiency
What is Aortic valve insufficiency of Rheumatic Heart Disease more commonly caused by?
- bacterial endocarditis
- rheumatic fever
- tertiary syphilis
(Rarely caused by AS)
What is Tertiary Syphilis characterized by?
The CV pathology in 80% of this disease, affects only the nervous system in minor cases, but in most cases affects the CV system
What is De Masset’s sign associated with?
Tertiary Syphilis
WHat is De Musset ‘s sign?
Rhythmic nodding/bobbing of the head
- Absolute finding in aortic insufficiency because pulse pressure is equal to systolic pressure in absence of diastolic pressure
What is Ankylosing Spondylitis?
Disease of the spine can lead to aortic insufficiency artificial valves can be placed into the heart to replace the aortic valve - must take medication to prevent the formation of thrombocytes and inflammation
What are the most common (MC to least common) of Rheumatic heart disease stenosing?
1) Mitral Valve
2) Aortic Valve
3) Tricuspid (rare)
4) Pulmonary valve with RF (does not affect these valve)
What is Bacterial Endocarditis?
Infection can result in the heart valves, where there is a good environment for the bacteria to grow -> direct infection to the heart
What are the 2 major types of Bacterial Endocarditis?
- Acute Bacterial Endocarditis
- Subacute Bacterial Endocarditis
What are the characteristics of Acute Bacterial Endocarditis?
- Sudden development and very high mortality rate
WHat is the cause of acute bacterial endocarditis?
Different bacteria, commonly staphylococcus aureus
- prognosis - BAD
What are the main characteristics of Subacute Bacterial Endocarditis?
Lower mortality rate, (able to survive and cure with proper treatment)
What is the cause of Subacute Bacterial Endocarditis?
Commonly Streptococcus Viridans aka Streptococcus Mitis
- An alpha hemolytic bacteria
- Forms non-transparent greenish layer around colonies
What can cause complications with Subacute Bacterial Endocarditis ?
> 50% are complicated by the development of an ischemic/hemorrhagic stroke
- Affects women more commonly
What are the portals of entry for subacute bacterial endocarditis?
Bad tooth/cavity
Prostate gland
Ovaries
Streptodermia
Lung chronic pneumonia
Gallbladder