Study Flashcards
what is atherosclerosis
build up of fatty plaque deposits in the arteries
What happens if a plaque ruptures in a coronary artery
Causes a blood clot and blocks a coronary artery
What happens if plaque occlusion of an artery reaches 70%
insufficient blood will be delivered leading to heart failure
What BP is hypertension
140/90
how many women have hypertension
1 in 5
how many men have hypertension
1 in 4
Why does the CV system fatigue during hypertension
heart has to work harder due to enlarged walls, shrinking chambers, and peripheral resistance of the heart
What is peripheral vascular disease?
Atherosclerosis in the periphery
What causes ischemic pain
lack of O2
What happens if a plaque ruptures in a the periphery
stroke or myocardial infarction
Can exercise repair ischemic tissue
No
Can exercise remove atherosclerotic deposits
Not completely
When should you return to exercise after a CV event
ASAP (within 8-12 weeks)
What chamber of the heart can be impaired in patients with CHD
left ventricle
What is BP
Cardiac output * Total peripheral resistance
Cardiac output
HR * SV
Who should use the Bruce assessment protocol
young/healthy people as it is faster and more intense
Who should use the Naughton assessment protocol
Less functional people
Who should use the Balke-Ware assessment protocol
Less functional people
What are the Angina rating scale
- Mild, barely noticable
- Moderate, bothersome
- Moderately severe, very uncomfortable (consider terminating the test here)
- Most severe pain ever experienced (stop the test)
What are the Dyspnea rating scale
- Light, barely noticeable
- Moderate, bothersome
- Moderately severe, very uncomfortable (consider terminating the test here)
- Most severe or intense dyspnea ever experienced (stop the test)
What can cause a myocardial infarction
Usually a result of atherosclerotic plaque rupture (can be coronary artery or peripheral)
Does the heart stop beating during a myocardial infarction
Not always
Symptoms of myocardial infarction
angina
shortness of breath
anxiety
Treatment of myocardial infarction
O2 supplementation
Nitrogylcerin - vasodilator (causes arteries to dilate and pump more blood through)
Defibrillation - shock the SA node
What is Heart Failure
Inability for the heart to deliver blood to metabolising tissue
Does the heart stop beating during a heart failure
No
What is systolic heart failure
impaired ventricular contraction
What is diastolic heart failure
impaired ventricular filling
What is Valvular Regurgitation
Leaflets of valve don’t close properly allowing blood to seep back thru
Volume overload of ventricles occur if blood is pumped back into the aorta
Enlargement of the chamber
Can lead to heart failure
What is stenosis
Leaflets of valves fail to open properly
Higher resistance is encountered (higher blood pressure)
Hypertrophy of ventricular walls
Can lead to heart failure
Can Valvular Regurgitation and Stenosis lead to heart failure
Yes
What is the role of statins
inhibit liver cholesterol
What is the role of beta blockers
limit HR
What is the role of anti arrhythmic agents and anti thrombogenic agents
thinning the blood and maintaining sinus rhythm
What is the role of ACEI
vasodilator in the peripheral arteries
What is the role of anti anginal agents
vasodilation of the coronary arteries