PATH - 9-25 - Vascular, Valvular Dz and Atherosclerosis Flashcards
A: ______ Thickening is the Vascular response to injury.
B: What are the 3 Steps to this process
A: Intimal Thickening is the Vascular response to injury.
1st: Smooth m. cells from [Tunica Media] are recruited into the [Tunica intima]
2nd: Those Smooth m. cells undergo mitosis inside [Tunica intima]
3rd: Extracell matrix starts to โelaborateโ
A: Describe Arteriosclerosis
B: List the 3 possible types
Arteriosclerosis is โHardening of the arteriesโ (arterial wall thickening and loss of elasticity) with 3 possible types:
โ Atherosclerosis (Tunica intima Dz)
โ MMcS - Monckebergโs medial calcific sclerosis
โ [HIA - HTN induced Arteriosclerosis]
A: Name the Elastic arteries affected by Atherosclerosis? (3)
B: Muscular arteries affected by Atherosclerosis? (5)
Elastic arteries affected:
โ Aorta (abdominal more than thoracic)
โ Carotid
โ iLiac
B: Muscular arteries affected: [MC gave CPR]
โ Coronary
โ Popliteal
โ Renal
โ Mesenteric
-Circle of Willis
Whoโs more at risk for ATHerosclerosis development? (8)
Girls Having PMS Can DEC Hyperlipidemia
- Genetics
- HTN
- Postmenopausal women (ESTROGEN IS PROTECTIVE)
- MALES
- Smokers cigarettes
- Pt with Chronic Inflammation ( [high sensitive CRP] is a normal lab parameter for athersclerosis now)
- DM
- Hyperlipidemia pts
A: ATHerosclerosis is an _____ Wall _____ response to _____โ> that involves the interaction of 4 components. It eventually leads to โ-> _____ _____.
What 4 components interact during ATHerosclerosis?
C: Which hypothesis is this?
D: Which size arteries are mostly affected by ATHerosclerosis? (2)
A: Arterial Wall [Chronic Inflammatory response] to [Chronic Endothelilal Injury] that involves interaction of TLC-m:โ> โarterial hardeningโ
- Lipoproteins
- [monocyte macrophages]
- [T-lymphocytes]
- Cellular Constituents
C: :Response to Injuryโ
D: Large to [muscle medium] size arteries
- Atheromas* consist of
1. Fibromuscular Cap
2. Cellular area beside the Cap
3. [Lipid Necrotic Core]
B: Describe the Composition of the Fibromuscular Cap (2)
C: In which Tunica are Atheromas located
- Atheromas* consist of
1. Fibromuscular Cap
2. Cellular area beside the Cap
3. [Lipid Necrotic Core]
B: Fibromuscular Cap:
-[Smooth muscle cells] + [Dense Connective Tissue Fiber]
C: TUNICA INTIMA
- Atheromas* consist of
1. Fibromuscular Cap
2. Cellular area beside the Cap
3. [Lipid Necrotic Core]
B: Describe the Composition of the Cellular area beside the Cap (3)
C: In which Tunica are Atheromas located
- Atheromas* consist of
1. Fibromuscular Cap
2. Cellular area beside the Cap
3. [Lipid Necrotic Core]
B: Cellular area beside the Cap:
- macrophage
-[smooth muscle]
-T-lymphocytes
C: TUNICA INTIMA
- Atheromas* consist of
1. Fibromuscular Cap
2. Cellular area beside the Cap
3. [Lipid Necrotic Core]
B: Describe the Composition of the [Lipid Necrotic Core] (4)
C: In which Tunica are Atheromas located
D: Where does neovascularization of the Atheroma occur?
- Atheromas* consist of
1. Fibromuscular Cap
2. Cellular area beside the Cap
3. [Lipid Necrotic Core]
B: [Lipid Necrotic Core]: is a ..
โLipid Filled Plasma Cakeโ
*Cholesterol Crystals
*[Lipid filled Foam Cells]
*Fibrin
*Plasma Proteins
C: TUNICA INTIMA
D: Periphery of Lesion
Atherosclerotic Cholesterol Emboli
A: What does the D represent?
B: What does the C represent?
D = Dense Plaque
C = Calcification of a Dense [Atherosclerotic Plaque]
Fatty Streaks
A: Possible Precursor of what?
B: Color? Shape? Composition(3)?
C: What demographic are they found in?
D: Where in the vessel do they occur?
Fatty Streaks
A: Possible Precursor of an [Atherosclerotic Plaque]
B: Yellow / Flat lesions made of [Lipid filled foam cells] / T-lymphocytes / [Extracell debris]
C: FOUND IN EVERYONE OVER 10 YEARS OLD
D: Near Branch Points of vessel
A: Where are [MMcS - Monckebergโs Medial calcific Sclerosis] found?
B: Why Arenโt these a problem?
C: What happens if this progresses?
A: [MMcS - Monckebergโs Medial calcific Sclerosis] are Calcific depositis found within [Tunica Media] of [muscular medium arteries]
B: They are NON-Obstructive
C: If calcification progresses, arteries may be more appreciable
A: What are the 2 forms of [HIA - HTN induced Arteriosclerosis]
A:
- Hyaline Arteriolosclerosis
- Hyperplastic Arteriosclerosis
Hyaline Arteriosclerosis
A: What pt demographics are at risk? (3)
B: Findings (3)
C: This is 1 of 2 types of ______
Hyaline Arteriosclerosis
A: Seen in patients with
- hypertension,
- DM
- normotensive elderly
B: Findings:
- -Homogeneous pink hyaline thickening of arterioles*
- lumenal narrowing from plasma protein leakage across injured endothelial cells
- increased smooth muscle cell matrix in response to hemodynamic stress.
C: This is 1 of 2 of [HIA - HTN induced Arteriosclerosis]
Hyperplastic Arteriosclerosis
A: What pt demographics are at risk?
B: Findings (2)
C: What Disease does this cause of untreated?
D: This is 1 of 2 types of ______
Hyperplastic Arteriosclerosis:
A: Seen in
- severe acute elevation of blood pressure - (malignant HTN where diastolic BP > 120 mmHg)
B: Findings:
*Onion skin concentric thickening of arteriole wall.
*Laminations made of smooth muscle cells with thickened reduplicated basement membranes.
C: Lumen narrowing โ> end organ ischemia
D: This is 1 of 2 types of [HIA - HTN Induced Arteriosclerosis]
Hyaline arteriolosclerosis
Hyperplastic arteriolosclerosis
โOnions are Plasticโ
Identify these Aneurysm Types
A: Normal Vessel
B: [Saccular True Aneurysm] = 1 side
C: [FusiForm True Aneurysm] = 2 SIDES
D: False Aneurysm
E: Dissection (Tear in Intima)
3 Characteristics of Aneurysm Pathogenesis
- Poor intrinsic quality of vascular wall connective tissue (Marfan syndrome / Ehlers Danlos)
- Altered balance of collagen degradation and synthesis (INC [Matrix Metalloproteinases])
- Weakened vascular wall from loss of smooth muscle cells or inappropriate synthesis of [extracellular matrix] (caused by Ischemia from Atherosclerosis or HTNโ> AORTIC Aneurysms)
A: What are the asterisk representing
B: This is a common finding of ____ and caused by ______
A: [Cystic medial Degeneration]
B: Common finding of Aneurysms caused by loss of smooth muscle cells โ> โcysticโ spaces
A: Describe the 2 Step Etiology of [Abdominal Aortic Aneurysm]
B: Where does a AAA typically occur? (2)
C: What type of Aneurysm can it form into? (2)
D: What are the 3 Demographics most at risk?
Abdominal Aortic Aneurysm
A: Etiology:
1st: Atheromas compress [aortic media] โ> Ischemia and eventual Degeneration of [Tunica Media]โ> weakning and thinning!
2nd: Inflammatory infiltrates then come and release [Matrix Metalloproteinase] which worsen the condition โ> AAA!
B: Infrarenal and above aortic bifurcation
C: Can be [Saccular True Aneurysm] OR [FusiForm True Aneurysm]
D: Men / Smokers / [Pt over 50]
A: Describe the 2 Classifications for Aortic Dissection
B: Which Classification involves all of the Aorta?
[Type A - DeBakey type 1 and 2] - PA12
i. Proximal lesions involving
- ascending and descending aorta = Type 1
- ascending aorta only = Type 2
vs.
[Distal - Type B - DeBakey type 3] - DB3
i. Distal - does not involve ascending aorta and begins distal to subclavian artery
A: #1 Cause of Aortic Dissection and 2 Contributing factors?
B: Clinical Presentation (3)
C: Tx (2)
Aortic Dissection
A:
- Etiology: 90% caused by HTN (Mechanical Pressure vs. Ischemic injury)
Contributing factors for this are:
- Medial hypertrophy of vasovasorum
- Degenerative changes of media 2ยบ to Connective Tissue Disorder (Marfans Syndrome)
B:
- Sudden onset of ripping chest pain radiating to back
- CXR with [mediastinal widening]
- Proximal Dissectionโ> [pulse and neurological deficit] + [Aortic Regurgitation]
C: Tx:
*Blood Pressure Control
*Surgery for acute proximal dissection