cardio vocabulary

41 terms by mcostakis

Create a new folder

Advertisement Upgrade to remove ads

cardo vocabulary

arrhythmia

abnormal cardiac rhythm, time span between each beat is irregular

end systolic volume

is the volume of blood in each ventricle at the end of ventricular systole (amount of blood left in heart)

atrial systole

contraction of the atria

systolic blood pressure

is the pressure in the arteries during ventricular contraction

stroke volume

volume of blood pumped by a ventricle per beat/contraction
stroke volume determine by
1. preload
2. contractility
3. afterload

SA node

pacemaker because it determines heart rate

venous return

is the amount of blood returning to the heart via vena cavae
assistance from skeletal muscle, thoracic pump-breathing brings blood to the heart & valves

ventricular diastole

is relaxation of the ventricles

conduction system path

SA node---->AV node---->AV bundle---->bundle branches--->Purkinje fibers

baroreceptors

detect blood pressure in the aortic sinus and carotid sinus
help monitor and regulate blood pressure

chordae tendineae

function to prevent AV valves from opening under pressure

hydrostatic pressure

physical force exerted against a surface by a liquid
aka blood pressure
forces fluid out of the capillaries by filtration

hepatic portal vein

drains the organs of the digestive tract

precapillary sphincters function

in the control of the flow of blood into a capillary

osmotic pressure due to

albumin (plasma proteins)

capacitance vessels

veins

diastolic blood pressure

is the pressure in the arteries as the ventricles relax

p wave

SA node firing and wave of depolarization in the atria

QRS

ventricular depolarization and masks the atrial repolarization

T wave

ventricular repolarization

sympathetic nervous system increases

heart rate and contractility

peripheral resistance

aka afterload
resistance to blood flow due to diameter or blood vessels

blood pressure

is determined by the cardiac output and peripheral resistance
force and the amount of blood pumped

cardiac output

volume of blood pumped out by a ventricle each minute
= heart rate X stroke volume

end diastolic volume

(EDV) the volume of blood in each ventricle at the end of ventricular diastole (relaxation of ventricle)

contractility

is the force of contraction of the heart

autorhythmic

heart initiates its own heart rate

ectopic heart beat

is a beat that begins outside the SA node

preload

amount of blood in ventricles prior to contraction (volume)
-determined by EDV & Venous return
- if increase preload then increase force of contraction

afterload

resistance.
amount of resistance the ventricles must contract against

bradycardia

slow heart rate, less than 60

tachycardia

fast heart rate, over 100

fibrillation

you don't have meaningful rate

asystole

no contraction

PR interval

period of time the wave of depolarization is delayed in the AV node while the atria contract

ST segment

period of time between the depolarization of the ventricles and repolarization of ventricles. this is the time the ventricles are contracting

conduction system

was of depolarization

ducuts venosus

blood bypasses liver

ductus arteriosus

blood bypasses lungs by going from pulmonary trunk into aorta

foramen ovale

right atrium to left atrium

cardiac cycle

1. atrial systole
2. isovolumeteric ventricular contraction
3. ejection
4. isovolumetric ventricular relaxation
5. passive ventricular filling

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set