Chapter 9 - Blood Vessels Pt. 1 Flashcards
Increased vascular resistance can lead to what vascular condition?
Hypertension
Deceased sodium excretion can lead to what vascular condition?
Hypertension
What risk factors are associated with hypertension?
Age, stress, obesity, smoking, inactivity, increased salt intake, genetics
What race is more likely to develop hypertension?
African Americans
What type of personality can put one at a higher risk of developing hypertension?
Type A personality
What is malignant hypertension?
Around 200/120 BP (5% of all hypertension cases) which is usually lethal within 1-2 years
How can malignant hypertension be detected early on?
Papilledema or retinal hemorrhage
How can malignant hypertension be detected in its later stages?
Renal failure
Increased blood pressure can increase the risk of what conditions?
Ischemic heart disease, stroke, congestive heart failure
What are the steps of vascular wall responses to injury?
- Endothelial injury/dysfunction
- Smooth muscle cell recruitment
- Growth of smooth muscle cell & ECM
- Irreversible intimal thickening
What can irreversible intimal thickening as a result of vascular injury lead to?
Vessel stenosis (tissue ischemia)
How can aging affect the tunica intima of vascular structures?
Slight stenosis but usually isn’t clinical
What is the term for hardening of the arterioles?
ArterioLOsclerosis
What is term for the hardening of arteries?
Arteriosclerosis
How does arteriosclerosis develop?
Decreased elasticity and arterial thickening
What condition involves the calcification of the tunica media?
Monckeberg medial sclerosis
Does Monckenberg medial sclerosis lead to stenosis?
No
What is the usual age range of Monckeberg medial sclerosis?
> 50 years old
What is the most common form of arteriosclerosis?
Atherosclerosis
What is atherosclerosis?
Formation of atheromas (plaques)
Where can atherosclerosis occur?
Heart (CAD), brain, intestines, kidneys, legs
What form of arteriosclerosis is age-related?
Monckeberg medial sclerosis
What organs are most sensitive to hyperplastic arteriolosclerosis?
Kidneys
Which arteriole reaction occurs in response to benign hypertension?
Hyaline arteriolosclerosis
Which type of arteriole reaction occurs in response to severe hypertension?
Hyperplastic arteriolosclerosis
Onionskin appearance is indicative of what arteriole response to hypertension?
Hyperplastic arteriolosclerosis
Prolonged diabetes mellitus is associated with which arteriole response to hypertension?
Hyaline arteriolosclerosis
What percentage of arteriosclerosis cases are actually atherosclerosis?
99%
What is the number one cause of morbidity and mortality in the U.S.?
Atherosclerosis (CAD, myocardial infarction, stroke)
What effect does atherosclerosis have on blood flow?
Decrease
What is the most common cause of myocardial infarction?
Atheromas due to atherosclerosis
What layer of the vessel is weakened in atherosclerosis?
Tunica media
A weakened tunica media is a risk for what issue?
Aneurysm
What are the foam cells seen in an atherosclerosis plaque?
Fat-laden macrophage
When is chest pain present in coronary artery disease?
When 70% of the arteries are occluded
Which type of plaque has inflammation present, as well?
Vulnerable
Which type of plaque has a fibrous cap providing support?
Stable plaque
What type of blood flow is seen with atherosclerosis?
Extra turbulent
Too many LDLs and too little HDLs (hyperlipidemia) increase the risk of what vascular condition?
Atherosclerosis
What things can make cholesterol levels better?
Exercise, moderate alcohol, statin meds