Vascular Disease Flashcards
Blood Flow in The Arterial & Venous System depends on?
A disturbance disrupts?
3
Depends on a system of
- patent blood vessels and
- adequate perfusion pressure
A disturbance disrupts:
- The delivery of oxygen and nutrients
- The removal of waste products
- The return of blood to the heart
Effects of Blood Vessel Disease Physiology
Arterial disorders? 2
Venous disorders? 2
Arterial disorders
- Decreased blood flow to the tissues
- Impaired delivery of oxygen and nutrients
Venous disorders
- Interference with the outflow of blood from the capillaries
- Interference with removal of tissue wastes and return of blood to the heart
- Pathologic changes in the vessel wall are? 2
- Raynaud’ phenomenon is caused how? (printzmentals, MI)
- Abnormal vessel dilation problems? 2
- Tumors or edema cause what?
- Atherosclerosis and vasculitis
- Acute vessel obstruction due to thrombus, embolus or vasospasm
- Arterial aneurysms (weakeningof the wall) or varicose veins
- Compression of blood vessels by extravascular forces
Arteriosclerosis
three types?
- Atherosclerosis
- Moenckeberg medial calcific sclerosis
- Arteriolosclerosis
Describe what the following are:
- Atherosclerosis
- Moenckeberg medial calcific sclerosis
- Arteriolosclerosis
Atherosclerosis
-Plaque buildup made up of fat, cholesterol, or calcium
Moenckeberg medial calcific sclerosis
- Calcium deposits in the muscular middle layer (Tunica Media)
- Poorer diagnosis
Arteriolosclerosis
-Vessel wall thickening and luminal narrowing in the small arteries and arterioles
Common Features of arteriosclerosis?
3
- Stiffening of arterial vessels
- Thickening of the arterial wall
- Degenerative nature of the disease
Arteriosclerosis 2 vs Atherosclerosis
Arteriosclerosis:
- Thickening and hardening of arterial walls.
- Loss of elasticity of medium or large vessels.
Atherosclerosis:
Specific form of arteriosclerosis caused by build up of fatty plaques and cholesterol in the arteries.
Major complications of atherosclerosis
4
- Ischemic heart disease
- Stroke (Carotid Arterial Disease)
- Aneurysm
- Peripheral vascular disease
Atherosclerosis develops in response to what?
What can this cause?
6
vascular injury and involves inflammation and vessel remodeling
- Hypercholesterolemia
- Diabetes
- Smoking
- Hypertension
- Obesity
- Family history of early heart disease
Clinical Presentation of Atherosclerosis
- Cardiac? 2
- Arteries in arms and legs? 1
- Kidneys? 1
- Genitals? 1
- Neurologic? 4
Cardiac:
- Chest pain/pressure (angina)
- Sudden numbness or weakness in arms or legs, difficulty speaking or slurred speech, or drooping muscles in your face.
Arteries in arms and legs
1. Leg pain when walking(intermittent claudication)
Kidneys
1. High blood pressure or kidney failure
Genitals:
1. Difficulties with sex or erectile dysfunction in men
Neurologic:
- Sudden numbness or weakness in arms or legs
- Difficulty speaking or slurred speech
- Drooping muscles in face
- TIA (Transient ischemic attack) may progress to a stroke
What can cause paralyzing strokes?
- Vascular disease can block the carotid arteries to the brain and cause paralyzing strokes.
- Whats a TIA?
- Whats it caused by?
- How do you want to work this up? 3
- What do we send them home on? 2
- Transient episode of neurologic dysfunction caused
- by loss of blood flow either focal brain, spinal cord or retinal without infarction (tissue death)
- US and listen for carotid
- EKG for AFIB
- TE
- Statin
- Aspirin
How can a TIA present? 3
When does it usually resolve?
A stroke lasting more than 24 hours is usually what?
Can present as a
- transient hemispheric event or 2. monocular blindness (amaurosis fugax),
- aphasia, slurred speech (dysarthria) and mental confusion.
Usually resolves in 24 hours.
Stroke >24 hrs and usually an embolus
Carotids Evaluation 4
(whats our first step test?)
(whats the gold standard?)
- Physical Exam
- Duplex(go to right away)
50% in symptomatic & 80% in asymptomatic require intervention
At least one other to confirm - MRA (Magnetic Resonance Angiography)
- CTA (Computed Tomography Angiography)
- Angiography (gold standard, but risks are stroke or bleeding plus high cost)- absolute diagnosis
Asymptomatic patients with CAS (Carotid Arterial Stenosis) >___% will benefit from surgery assuming the surgeon has complication rate
80
2
prophylactic
- Rheumatic Fever is what?
- Whats it believed to be caused by?
- Usually develops how often after Group A strep?
- Usually appears in what kind of population?
- Inflammatory disease following
Streptococcus pyogenes infection i.e. Strep pharyngitis. - Believed to be caused by antibody cross-reactivity.
- two to four weeks
- Usually appears in children between the ages of 6 and 15 with only 20% of first time attacks occurring in adults.
Major Manifestations of Rheumatic Fever
5
- Migratory arthritis (predominantly involving the large joints)
- Carditis and valvulitis (eg pancarditis)
- Central nervous system involvement
- Erythema marginatum
- Sydenham’s chorea (rapid movements without purpose of the face and arms occurring late in the disease
Carditis and valvulitis (eg pancarditis) will present how (from rheumatic fever?
3
- Myocarditis which can manifest as congestive heart failure with shortness of breath
- Pericarditis with a rub
- New heart murmur
Minor Criteria for rheumatic fever?
6
- Fever of 100.8-102.0
- Arthralgia: Joint pain without swelling
- Elevated ESR or C reactive protein
- Leukocytosis
- ECG showing features of heart block such as prolonged PR interval. (Cannot be included if carditis is present as a major symptom)
- Previous episode of rheumatic fever
Modified Jones Criteria For Diagnosis
of Rheumatic Fever
2
What are the exceptions?
2
- Two major criteria
- One major criteria plus two minor criteria.
Exceptions:
- Chorea
- Indolent carditis
Treatment of Rheumatic Fever
3
Anti-inflammatory
- Aspirin (ASA)
- NSAID’s
- -Ibuprofen for moderate to severe inflammatory reaction
- -Corticosteroids - Antibiotics
Treatment of heart failure with rheumatic fever?
4
What do you have to be careful with in Reye’s syndrome?
What antibiotics would we use? 2
Heart failure:
1. Ace inhibitors 2. Diuretics 3. Beta Blockers 4. Corticosteroids
Be careful in children as ASA associated with Reye’s Syndrome
Risks, benefits and alternative treatments must always be considered
- Penicillin or Clarithromycin or
- Zpack
Disorders of the aorta include:
2
- Aneurysms (bulges) in weak areas of its walls
2. Dissection (separation of the layers of it’s wall)
- Aneurysms (bulges) in weak areas of its walls can develop where?
- 90% of aortic aneurysms develop where?
- WHats the most common cause?
- Can develop in the arteries where?
- Can develop anywhere along the aorta
- 90% of aortic aneurysms develop in the abdominal aorta
- Most common cause is atherosclerosis
- Can develop in the arteries at the back of the knee (popliteal arteries)
What is Dissection?
Inner lining of the aortic wall tears
Artery wall deteriorates and usually associated with high blood pressure (separation of the layers of it’s wall)
Describe the onset of Aortic Aneurysm/Dissection
These disorders can be immediately fatal, but they usually take years to develop.
Thoracic Aortic Aneurysm (TAA)
May be secondary to what?
2
May be secondary to collagen vascular diseases
- Marfan’s Syndrome 2. Ehlers- Danlos Syndrome
Thoracoabdominal
Describe Traumatic occur at ligamentum arteriosum? 2 (where does it develop and how?)
Crawford Classification of Thoracoabdominal TA/AA: where does it commonly develop? 4
- Just beyond the Left subclavian artery
- From rapid deceleration accidents (MVA’s & Falls)
- I (L) subclavian to renal arteries
- II (L) subclavian to iliac bifurcation
- III Midthoracic to infrarenal
- IV Distal thoracic to infrarenal
Thoracic Aortic Aneurysms
Clinical presentation? 5
If we see these symptoms what should we do?
Most present how?
Clinical Presentation/Treatment
Symptomatic can have any/all of the following symptoms:
- Sub sternal, back or abdominal pain
- Dyspnea, stridor, or brassy cough (trachea pressure)
- Dysphagia (Pressure on esophagus)
- Hoarseness (Pressure on recurrent laryngeal nerve)
- Neck and arm edema from SVC compression
Start Beta Blockers and call surgeon
Most are asymptomatic
Abdominal Aortic Aneurysms AAA:
- Most originate where?
- What has decreased mortality?
- Half of newly detected aneurysms are how big and 2/3 will need what?
- > 90% Originate BELOW the renal arteries
- ROUTINE U/S screening of high-risk groups has decreased mortality by 53%
- Half of all newly detected aneurysms are less than 5cm and 2/3 will eventually require surgical repair
Screening For AAA
1. How should we screen?
- Who should we screen? 2
- Abdominal ultrasonography is a highly sensitive and specific screening test for AAA
- One-time screening recommended in men ages 65-75 who have ever smoked.
- One-time screening for men ages 65-75 who have never smoked but who have a first degree relative who required repair of an AAA or died of ruptured AAA
Clinical Presentation of AAA:
Asymptomatic? 3
Symptomatic? 2
Asymptomatic
- Picked up on routine physical exam with prominent aortic pulsation and/or lateralization
- Incidental finds on CT scan or US
- 25% will also have LE occlusive disease
Symptomatic
- Midabdominal or lower back pain with prominent aortic pulsations
- Aneurysms that produce symptoms are at increased risk for rupture
Arterial Embolism/Thrombosis:
1. Whats an embolism?
- Classified by substance. Name the 7 embolisms classifications.
- Whats thrombosis?
- Embolism: Sudden interruption of blood flow to an organ or body part due to embolus adhering to the wall of an artery blocking the flow of blood.
- Thromboembolism: embolism of thrombus (blood clot)
- Cholesterol embolism: embolism of cholesterol often from atherosclerotic plaque inside a vessel
- Fat embolism: embolism of bone fracture or fat droplets
- Air embolism: embolism of air bubbles
- Septic embolism: embolism of bacteria containing pus
- Tissue embolism: embolism of small fragments of tissue.
- Foreign body embolism: foreign materials such as talc and other small objects
- Thrombosis: formation of a blood clot (thrombus) inside a blood vessel, obstructing the flow of blood.
Sites of Embolization
7
Bifurcations
- Femoral – 40%
- Aortic – 10-15%
- Iliac – 15%
- Popliteal – 10%
- Upper extremities – 10%
- Cerebral – 10-15%
- Mesenteric/visceral – 5%