girl idek

1) What is #1?

2) What does it do?

1) Pulmonary semi-lunar valve

2) Lets blood from the right ventricle into the pulmonary artery

1) What is #2?

2) What does it do?

1) tricuspid valve

2)lets blood from the right atrium into the right ventricle

1) What is #3?

2) What does it do?

1) pericardium

2) allows heart to beat without friction

1) What is #4?

2) What does it do?

1) aortic semi-lunar valve

2) lets blood from the left ventricle into the aorta

1) What is #5?

2) What does it do?

1) bicuspid valve

2) lets blood from the left atrium into the left ventricle

1) What is #6?

2) What does it do?

1) chordae tendineae

2) prevents AV valves from flipping inside out or bulging

in the “lub dub” heart sound, what is the “lub” ?

closure of the AV valves

in the “lub dub” heart sound, what is the “dub” ?

closure of the semilunar valves

blood pressure is systolic pressure/diastolic pressure. What is systolic pressure measuring?

pressure on arterial wall when blood is actively being pumped against it

blood pressure is systolic pressure/diastolic pressure. What is diastolic pressure measuring?

pressure on arterial wall when there is not blood being pumped against it

what are the 3 factors affecting blood pressure?

blood volume, cardiac output, peripheral resistance

what is blood volume?

the amount of blood in your body

what is peripheral resistance?

the opposition to flow that blood encounters: viscosity, vessel length, vessel radius

what is heart rate?

the amount of times a heart beats per minute

what is cardiac output?

the amount of blood that is pumped out of the heart in one minute

what is stroke volume? 😈

the amount of blood the heart pumps out in one pump

how do you calculate cardiac output?

heart rate x stroke volume

what is #1?

SA (sinoatrial) node

what is #2?

AV (atrioventricular) node

what is #3?

the bundle of His

what is #4?

left branch bundle

what is #5?

right branch bundle

what is #6?

purkinje fibers

name part 1 and explain what is happening

P wave: SA node fires, atria depolarize & contract

name part 2 (red) and explain what is happening

QRS complex: ventricular depolarization, start of contraction

name part 3 and explain what is happening

ST segment: finishing ventricular systole

name part 4 and explain what is happening

T wave: ventricular repolarization

what does this EKG show?

Normal Sinus Rhythm 🙂

what does this EKG show?

Wolf Parkinson White: wide QRS complex

what does this EKG show?

Atrial Fibrillation: atria just quiver, many small P waves

What does this EKG show?

Premature Ventricular Contraction: AV nodes fires too soon, weird QRS complex

what does this EKG show? (QRS complex overrides T wave)

Ventricular Techycardia

what does this EKG show? (you’re cooked)

ventricular asystole: no P wave or QRS complex

what does this EKG show? (ST elevation or depression)

myocardial infarction (heart attack)

what does this EKG show?

atrial flutter: many P waves

what does this EKG show? (cooked)

ventricular fibrillation: chaotic rhythm of ventricles

what are the three types of capillaries

continuous, fenestrated, discontinuous

where are continuous capillaries found? what do they do?

skeletal muscle, some organs, blood brain barrier. They regulate precise exchange

where are fenestrated capillaries found? what do they do?

kidneys, synovial membranes, brain. They allow smaller substances to be exchanged, used to filter blood

where are discontinuous capillaries found? what do they do?

liver, red bone marrow. Blood spills out of them for larger exchanges

what is an aneurysm

ballooning of a blood vessel wall

what is angina pectoris

chest pain due to blockage in coronary blood flow

what is atherosclerosis?

buildup of lipid plaque inside arteries

what is a myocardial infarction?

a heart attack, death of a piece of myocardium leading to long term obstruction of coronary circulation

what are varicose veins?

backflow caused by vein distention (squiggly veins)

what is DVT?

deep clots in the legs that causes swelling

what is mitral valve prolapse?

one or both mitral (bicuspid) valve cusps bugle into atria

what is valvualr stenosis?

cusps are stiff, opening is constricted by scar tissue

what is cardiac tamponade?

build up of fluid in pericardial sack, which squishes the heart

what is pericarditis?

inflammation of the pericardium, causing friction on the heart