Cardiovascular System Flashcards
Systole
Contraction phase of a heartbeat
Diastole
Relaxation phase of a heartbeat
Preload
The amount of ventricle stretch at the end of diastole
After load
The amount of pressure the heart needs to extend to eject the blood during ventricular contraction
How much do ventricles fill passively
75%
How much does arterial push to fill the ventricles ( atrial kick)
%25
Universal donor
O negative
Universal recipient
AB positive
Endocardium
Outermost layer
Contains blood vessels
Myocardiaium
Middle layer
Contractile tissues
Thickset
Epicardium
Innermost layer
Composers of vowels inner lining of chambers vessels, and nerves
Pericardium
A fibrous sac that encloses the heart
3 parts
Visceral
Innermost part of the pericardium
Parietal
Middle part of the pericardium
Fibrous
Most outside part of the pericardium
Right coronary artery
Supplies, right atrium, and most of the right ventricle
Left coronary artery
Supplies blood to the left ventricle left atrium and inter-ventricular septum
Left anterior descending artery
Supplies blood to the front and bottom of the left ventricle and the front of the steptum
Left circumflex artery
Supplies blood to the lateral walls of the left that circle in the left atrium
And in 50% of the population to the SA node it also supplies blood to the left posterior fasciculus
Of the left bundle branch, this artery circles, the left ventricle and rice blood to the ventricles posterior portion
Coronary sinus
Empties into the right atrium
When do the coronary arteries fill up?
When the heart is relaxed
Kortikoff sounds
This sounds heard when the Sega monometer when taking a blood pressure
Pulse pressure
The difference between systolic and diastolic pressure
Frank Sterling law
The greater the stretch, the stronger the contraction
Baroreceptors
Detect changes in blood pressure
Chemo receptors
Responses to chemicals
Chronotropic
Time
Change in hate rate
SA mode
Inotropic
Change of force in contraction
Dromotropic
Change in speed of impulse conduction through AV node
Atrial kick
Slight pause of impulse between the essay and AV node, so the blood has time to push into the ventricles
What is a heart murmur?
It is a hole in the stepped up. The septum separates the heart from the left or the right side. .
Automatically
Ability of heart to generate and conduct electrical impulses on its own
Contractility
The strength of contraction of the heart at any given end to diastolic volume
Conductivity
Ability to conduct an electrical impulse
Excitability
Very receptive to outside electrical stimulus
SA node
60 to 100 bpm
Av node
40 to 60 bpm
Third pacemaker
Bundle of His
Bundle, branches
Perkinje fibres 20-40 bpm
AV junction
The AV node and surrounding tissue, including the bundle of his
The bachmans bundle
Abroad, fan of cardiac muscle that passes from the right atrium between the superior vena cava, and the ascending aorta
Sympathetic
Increases epi and norepinephrine
Parasympathetic
Relaxes decrease histamine
