Create an account
Congestive heart failure (CHF) is a condition when the heart
cannot meet the demands of the body. The body compensates in three major ways
The pericardium is the
fibrous outer fluid filled layer that covers the heart and separates it from the contents in the chest cavity
When blood is on its way from the left atrium to the left ventricle
it goes through the mitral valve
Pulmonary vein is the only vein that carries
high oxygen blood; comes from the lungs and returns blood back to the left atrium for eventual circulation to body organs and cells
Ectopic is an adjective reerring to
an event or tissue occuring at a place other than its normal location
The order of the impulse in the conduction pathway is:
1. first it travels to the SA node also known as the sinoatrial node.
2. Next the impulse moves to the AV node also known as the atrioventricular node
3. Then on to the bundle of His
4. Throught the bundle of His where the impulse separates to travel through the right and left bundle branches
5. and finally the impulses reach the purkinje fibers
6. Once th electrical stimulus is in the purkinje fibers the ventricles contract.
Fibrillation is a nonsynchronous contraction of
muscle tissue, with individual cells firing at their own rate
the space between the lungs in the chest cavity; holds the heart and other respiratory units
If the patient has the right arm amputated above the elbow place the lead on the
upper part of the that arm
If the patient has an amputation, the important thing to do is to be sure that wherever you place the lead, you use the
same corresponding spot on the opposite limb
Pulmonary Artery is the only artery that
carries low oxygen blood; leaves right ventricle and goes to the lungs
Normal sinus rhythm has a rate of
60-100 beats per minute and each complex is complete and normal in appearance
Pulmonary circulation is
circulation that goes to the heart's right atrium to the lungs where it is oxygenated and releases built up carbon dioxide
An MI is a myocardial infarct and occurs when the
myocardial tissue suffers death to the area because of insufficient blood flow
You calculate the heart rate from an EKG strip by
counting the number of complete complexes in 3, or 6 seconds and multiply by 20 or 10
The difference between agonal and asystole on an EKG is that
asystole on an EKG ia flat line, while agonal is less than 20 beats per minute
There are many things that happen to an artery that contribute to having a heart attack. The following is a list of how it starts and how it ends
1. the first thing in the process is plaque builds up in the arteries, which narrows the artery
2. Then is a piece of this plaque breaks off, it bleeds and causes a clot to form
3. After which the clot travels along until it comes to an artery that is too narrow for it to pass through
4. Last thing that happens is that this cuts the blood supply off to that area and the area dies. A heart attack has occurred.
When the ventricles are in the systole phase, they are
pumping the blood out of the chamber by contraction
The left ventricle is the largest chamber in the heart because is has the job of
pumping blood out to all parts of the body
The receiving chambers of the heart are the
right atrium and left atrium and th etwo chambers that push the blood out of the heart called the left and right ventricles
The left ventricle is the largest chamber of the heart because it
pushes the blood out of the heart throughout the body
When the heart rate goes down to 40-60 beats per minute
the impulse is usually generated in the AV node
By having a relatively slow conduction rate, the AV node allows the atria to
empty more blood into the ventricles before they contract
Purkinjie fibers are organized in such a way as to
mediate a smooth contraction that wrings the blood from the apex out toward the base of the heart.
Stimulation of the vagus causes a
decreased heart rate, which in turn causes a drop in blood pressure.
a conduction disorder of the heart where electrical pathways other than the AV nodal system connect the atria with the ventricles. This type of disorder can lead to reentrant arryhthmias
located between the left atrium and the left ventricle. It has two cusps and it is also called the bicuspid valve
The Primary characteristics of the cardia cells are:
automaticity, excitability, conductivity, contractility
this is the ability of the cardiac pacemaker cells to spontaneously initiate their own electrical impulse without being stimulated from another source. Sites that possess this characteristic are the SA node, AV junction and the purkinje fibers
also referred to as irritability. This characteristic is shared by all cardiac cells and it is the ability to respond to external stimulus; electrical, chemical ad mechanical
This is the ability of all cardiac cells to receive an electrical stimulus and transmit the stimulus to the other cardiac cells.
this is the ability of the cardiac cells to shorten and cause cardiac muscle contraction in response to an electrical stimulus
outer sac surrounding the heart that separates the heart from the rest of the chest cavity
the cardiac muscle has three stages and can be called different terms
1. Contraction or Systole or Depolarization
2. Relaxation or diastole or repolarization
3. Baseline or polarization
The sympathetic system prepares the body for action by:
increasing heart rate
increasing blood pressure
blood flow increased to the skeletal muscle
blood flow decreased to the viscera
release of catacholamines by adrenal gland
retention of sodium and water ( secretion of renin from the kidney)
relaxation of bronchiolar smooth muscle
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 and try again
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