Cardiovascular System Flashcards
What are the four parts of the heart?
Left/Right Atria
Left/Right Ventricles
What brings blood into the right atrium?
Vena cavas
Brings blood into right atrium from head, neck, and upper extremities
Superior Vena Cava
Brings blood into the right atrium from lower extremities
Inferior Vena Cava
Valve between right atrium and right ventricle
Tricuspid valve
Right atrioventricular valve
Valve between right ventricle and pulmonary trunk
Pulmonary (semilunar) valve
What brings blood into the left atrium?
Pulmonary veins
Valve between left atrium and left ventricle
Bicuspid valve
Left atrioventricular valve
Valve between left ventricle and aorta
Aortic (semilunar) valve
Superficial layer of the heart
Mostly connective tissue
Epicardium
Muscle layer of the heart
Myocardium
Inner layer of the heart
In contact with the blood
Endocardium
Inflammation of the endocardium
Endocarditis
What gets damaged with endocarditis?
Heart valves
What occurs after strep throat if it is not treated?
Rheumatic fever
Cause of strep throat
Streptococcus pyogens
Process of gas exchange in the blood vessels
Arteries Arterioles Capillaries Venules Veins
Process of blood flow in the heart
Vena cavas Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary trunk Pulmonary arteries Lungs (alveoli/gas exchange) Pulmonary veins Left atrium Bicuspid valve Left ventricle Aortic valve Aorta
Where does gas and nutrient exchange occur in blood vessels?
Capillaries
Carries lymph
Collected extra fluid
Lymphatic vessels
Immune Function
Contain white blood cells
Lymph nodes
Mostly water
Contains proteins, ions, electrolytes, glucose
Liquid part
Plasma
What are the formed elements of blood?
White blood cells
Red blood cells
Platlets
What are the parts of blood?
Plasma
Formed elements
Also called leukocytes that fight off infection bc they recognize invaders
White blood cells
Contain hemoglobin
Transport oxygen around the body
Red blood cells
Another name for red blood cells?
Erythrocytes
What clots the blood?
Platlets
What is normal blood pressure?
120/80
Pressure on walls of large arteries during contraction of heart ventricles
Systolic Blood Pressure (systole)
Pressure reached in between contractions of ventricles in large arteries
Just before ventricular systole
Diastolic Blood Pressure (diastole)
High blood pressure is also called
Hypertension
What is considered high blood pressure?
Greater than 140/90
What is blood pressure measured in?
mmHg (milligrams of mercury)
What is the range for pre-hypertension?
Between 120/80 and 140/90
What are the long term causes of high blood pressure?
Heart has to work harder Enlarged heart Kidney damage Retinal damage Plaque in arteries (causes heart attack or stroke)
Another name for enlarged heart
Cardiomegaly
What is bad with an enlarged heart?
The bigger it gets, the thicker the walls get.. leaving less space for blood inside
Buildup of plaques inside arteries
Atherosclerosis
Fatty accumulations
Plaques
What are plaques called?
Atheromas
Narrowing
Stenosis
Narrowing of aorta
Aortostenosis
When does a stenosis of an artery happen?
When plaque builds up inside them
Hardening of arteries
Decrease in flexibility
Arteriosclerosis
What is arteriosclerosis due to?
Plaque accumulation and hyper tension
What is made up of cell membranes?
Cholesterol
What do you want your total cholesterol to be?
Less than 200mg/dl
What is the good cholesterol?
High density lipoprotein (HDL)
Desired HDL level
Greater than 60mg/dl
What is the bad cholesterol?
Low density lipoprotein (LDL)
Desired LDL level
Less than 100mg/dl
Too high of LDL =
Atherosclerosis
Blocks enzyme in liver
Decrease risk of plaque accumulation
Statins
Where does cholesterol mainly come from?
Liver
What determines your cholesterol level?
Genetics
Lifestyle
Smoking
How does one get an increased LDL level?
Sedentary lifestyle
Diet high in saturated/trans fat
High carbs (more than high fat)
Desired level of triglycerides
Less than 150mg/dl
Medical term for heart attack
Myocardial Infarction (MI)
What is a heart attack?
Blockage of a coronary artery that leads to part of the heart dying
Where do heart attacks typically occur?
In the arteries that supply the heart with oxygen
Low oxygen levels
Person cannot feel this
Ischemia
What does a heart attack cause?
Ischemia in the heart tissue
What is pain felt due to ischemia in the heart tissue?
Angina
A blockage in an artery that supplies the brain with oxygen that leads to death of some brain cells
Stroke
Medical term for stroke
Cerebrovascular Accident (CVA)
Clot blocking an artery
Most common type of stroke (80%)
Thrombotic stroke
Artery in brain ruptures
Hemorrhagic stroke
Ballooning out of an artery can happen anywhere
Aneurysm
What happens during an aneurysm?
Artery rupturing and allowing blood to leave the vessel, leading to a decrease in oxygen to brain
What destroys blood clots via dissolving?
Thrombolytic drugs
tPA
Tissue plasminogen activator
Purpose of tPA?
Using an IV to activate plasminogen in body to dissolve clots
Use body’s own defense system
A catheter being fed into a blood vessel in thigh and up to heart to remove a blockage
Balloon Angioplasty
How does a balloon angioplasty work?
Inflate balloon and smash plaque against the artery to insert a caged stent
Removal of plaque material from artery usually in common carotid artery
Decreases chance of fat getting loose
Endarterectomy
Harvest another artery form other place in body to get past the blockage
Coronary bypass surgery
CABG
Coronary artery bypass graft
Inflammation of vein
Phebitis
Dilated veins due to valve damage
Varicose veins
Why do people get varicose veins?
Blood pools in the feet/legs/ankles bc the valves in the veins don’t fight against gravity anymore
EKG/ECG
Electrocardiogram
Electrocardiogram
Graph of electrical activity in the heart
Abnormal heart rhythm
Arrhythmia
Abnormal heart sounds
Issues with valves
Murmur
AAA Meaning
Abdominal Aortic Aneurysm
What is AAA?
Ballooning of abdominal aorta
Will bleed out in seconds if ruptured