Cardiopulmonary Disorders Flashcards
What is the main organ of the circulatory system?
the heart
Where is the heart located?
middle chest, towards the left side
The heart is roughly the size of what?
a fist
What is the heart surrounded by?
pericardium
What is the pericardium?
fluid-filled sac
protects from trauma and infection
What are the 3 layers of the heart?
- Epicardium: outermost layer
- myocardium: muscle
- endocardium: innermost layer w/ valves, vessels, chordae tendineae
What are the chordae tendineae?
attaches to valves and allows them to open and close
What is the general route of blood in the cardiopulmonary system?
- oxygen-poor blood enters right side of heart from the body and goes out to lungs
- oxygen-rich blood enters the left side of heart from the lungs and goes out to the body
What are the 3 sections of the pulmonary system?
- Lung parenchyma
- upper airway
- lower airway/bronchial tree
What is housed in lung parenchyma
- right lung (3 lobes)
- left lung (2 lobes)
What is housed in upper airway?
- nose
- pharynx
- larynx
What is housed in the lower airway/bronchial tree?
- trachea
- bronchii
- lungs
Where does O2 (gas) exchange occur?
alveoli
What happens in the upper airway when we breathe in air?
air is humidified and filtered
What happens in upper airway when we speak?
air passes through larynx, causing vocal chords to vibrate creating sound
What is the purpose of the epiglottis?
- protective measure to flap over trachea when we are eating
- Flaps over pharynx to prevent aspiration into larynx and trachea
What happens during gas exchange at the alveoli?
CO2 is removed and blood is re-oxygenated
O2 crosses from alveoli to capillaries surrounding it via diffusion and binds with hemoglobin
What is the diaphragm doing as we breathe?
- creates pressure between outside and inside to allow air entering lungs
- moving down: creates negative pressure, so air moves into lungs
Which nerve is responsible for respiration?
vagus nerve (X)
Define ventilation
breathing (inspiration/expiration)
Why does ventilation occur?
occurs through pressure changes between the inside and outside of the body
What is the relationship between lung pressure and outside pressure?
- outside pressure > lung pressure = inspiration
- lung pressure > outside pressure = expiration
What is respiratory rate and what is it a function of?
number of times chest rises and falls with each breath (inhaled and exhaled)
12-20 is normal range
function of ventilation
What is perfusion?
blood flow through pulmonary capillaries where O2 exchange occurs
What is the pulmonary defense system?
- lungs exposed to many microorganisms
- 1st line of defense = upper airway filters
- other defense mechanisms: cough, mucous (acts like a trap), immune system (phagocytosis of unwanted intruders)
What is pulse rate, how is it taken, and what is the normal range?
- # of beats / min
- taken w/ radial artery
- normal: 60-100 bpm
- lower than 60: bradycardic
- above 100: tachycardic
What is respiratory rate and what is the normal range?
- # beats / min
- normal: 12-20 beats per minutes
What is blood pressure and how is it taken?
- force of blood pushing against artery walls
- taken by flexing muscle and find bicep tendon, just medial is brachial artery where there is pulse
Define the 2 components of taking blood pressure and their averages?
- Systolic: bp in arteries when heart is contracting (higher # - 1st heart beat is when pressure is released on bp cuff)
- diastolic: pressure in arteries when heart relaxes
- normal: 120/80 (systolic/diastolic)
- hypertension: over 90 diastolic
What is O2 saturation and what is the normal range?
- % measure of the amount of oxygen the blood is carrying
- normal: 95 and above
- below 90: dont treat unless orders from physician; suffer from pulmonary disease or cardiopulmonary disease
What are the systolic and diastolic ranges for prehypertension?
systolic: 120-130
diastolic: 80-89
What are the systolic and diastolic ranges for stage 1 high blood pressure?
systolic: 140-159
diastolic: 90-99
What are the systolic and diastolic ranges for stage 2 high blood pressure?
systolic: 160 or greater
diastolic: 100 or greater
What is the leading cause of death in men and women?
heart disease
What is the most common type of heart disease and why?
coronary artery (heart) disease b/c of obesity issue
What is seen in the arteries in coronary heart disease?
arteriosclerosis: hardening of arteries in the heart - plaque buildup
What are causes of coronary heart disease?
genetics and lifestyle
What are symptoms of coronary heart disease?
angina, shortness of breath, fatigue
What is an angioplasty?
helps with coronary artery disease
insert a balloon in artery through femoral artery
What are some treatment options for people with coronary artery disease?
- lifestyle changes
- lowering cholesterol- main mission
- weight reduction
- smoking cessation
- medication (pharmaceuticals)
- treatment in hospital: CABG or percutaneous coronary intervention (PCI) (aka angioplasty)
What is a CABG?
coronary artery bypass graft used to improve blood flow to heart
healthy vein/artery is connected to blocked artery
What can coronary artery disease lead to?
heart attack
What is the major determinate of impaired function and disability in coronary heart disease?
angina
How can functional impairment and disability be best determined?
based on medical history, physical exam, and exercise stress testing
How should the functional capacity of the individual with heart disease be described?
according to the classification of the New York Heart Association (NYHA)
What is the Class 1 functional capacity of an individual with heart disease?
- mild
- asymptomatic at ordinary effort level
- no limitation of physical activity
- symptoms with moderate effort
- ordinary activity does NOT result in fatigue, rapid/irregular heartbeat (palpitation) or shortness of breath (dyspnea)
What is the Class 2 functional capacity of an individual with heart disease?
- mild
- symptomatic w/ ordinary effort (e.g out of breath walking up stairs)
- slight limitation of physical activity; comfortable at rest
- ordinary activity results in fatigue, rapid/irregular heartbeat (palpitation) or shortness of breath (dyspnea)
What is the Class 3 functional capacity of an individual with heart disease?
- moderate
- symptomatic with minimal effort (eg. out of breath rolling out of bed)
- marked limitation of physical activity; comfortable at rest
- less than ordinary activity results in fatigue, rapid/irregular heartbeat (palpitation) or shortness of breath (dyspnea)
What is the Class 4 functional capacity of an individual with heart disease?
- severe
- symptomatic at rest (no effort)
- unable to carry out any physical activity w/o discomfort
- symptoms of fatigue, rapid/irregular heartbeat (palpitation) or shortness of breath (dyspnea) present at rest
- physical activity increases discomfort
In terms of coronary heart disease, what should be the main mission in all health care professionals?
primary prevention
What are some psychological and vocational implications of CHD/CAD
- psychosocial stress response
- depression
- type A personality
- denial
- economic loss
- reemployment: Rehab programs w/ multidisciplinary approach incorporating supervised exercise, education, nutritional and psychological counseling prove to be beneficial—improving psychological status and increasing rates of return to work.
What is progressive congestive heart failure (CHF)
- heart becomes weak and cant pump blood efficiently
- chambers of heart become enlarged and less efficient
- blood backs up (congests) in venous system
- tissues become overloaded (edematous)
- may see swelling in lower legs
What are the risk factors for congestive heart failure?
- hypertension
- previous damage to heart tissues (ie. from MI)
- valvular disease
- congenital defects
- stress
- obesity
- thyroid disease
- cardiomyopathies
Most patients with CHF have a past medical history of what?
hypertension
What is the most common cause of congestive heart failure?
coronary artery disease
Does congestive heart failure have a good prognosis?
no
American Heart Association heart failure Stage A
- at high risk for heart failure but w/o structural heart disease or symptoms of heart failure
- ex. hypertension, diabetes mellitus, CAD (port-MI or revascularization), peripheral vascular disease, CVA family history, exposure to cardiac toxins
American Heart Association heart failure Stage B
- has structural heart disease but w/o signs and symptoms of heart failure
- prior MI, left ventricular hypertrophy or reduced LVEF, asymptomatic valvular disease
American Heart Association heart failure Stage C
- has structural heart disease w/ prior or current symptoms of heart failure
- known structural heart disease and dyspnea, fatigue, reduced exercise tolerance
- NYHA class 1-4
American Heart Association heart failure Stage D
- has refractory heart failure requiring specialized interventions
- marked symptoms at rest despite maximal medical therapy, w/ recurrent hospitalizations
- NYHA class 3-4