Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
|
DESCRIBE THE 2 SEPARATE, BUT INTERRELATED SYSTEMS OF THE HEART.
|
Mechanical system that actually pumps the blood, and an electrical system that tells the mechanical system how and when to pump
|
|
|
Why are the walls of the ventricle much thicker than the walls of the atria?
|
because the lower chambers have to pump blood much further than the atria
|
|
|
Layer of the heart that contains the branches of the heart's electrical conduction system
|
endocardium
|
|
|
Layer of the heart that is made up of layers and bands of cardiac muscle fibers that are wound in complex spirals around the atria and ventricles.
|
myocardium
|
|
|
Layer of the heart wall that is a single layer of cells supported by connective tissue; contains nerves to the heart and coronary blood vessels
|
epicardium
|
|
|
Normal amount of fluid in pericardial sac.
|
50 mL
|
|
|
Location of tricuspid valve
|
between the right atrium and right ventricle
|
|
|
Location of mitral or bicuspid valve
|
between left atria and left ventricle
|
|
|
Location of pulmonic valve
|
at the exit from the right ventricle to the pulmonary artery
|
|
|
Location of aortic valve
|
at exit from the left ventricle to the aorta
|
|
|
This heart sound is associated with closure of the mitral valve and tricuspid valves, and corresponds to the onset of ventricular systole.
|
S1 (first heart sound)
|
|
|
This heart sound is associated with closure of the aortic and pulmonic valves. Also has 2 components in itself- first aortic, then pulmonic valve closure.
|
second heart sound or S2
|
|
|
This heart sound is a sign of pathology in an adult
|
S3 or third heart sound
|
|
|
This heart sound is related to atrial contraction that is more forceful than usual.
|
fourth heart sound or S4
|
|
|
This gallop rhythm is due to an exaggerated third heart sound
|
ventricular gallop rhythm
|
|
|
This gallop rhythm occurs in late diastole or just before systole
|
atrial gallop rhythm
|
|
|
This gallop rhythm occurs when a tachycardia is so rapid that the third and fourth heart sounds are blended into one.
|
Summation gallop rhythm
|
|
|
These reflect turbulence that can be caused by high flow rates, damaged valves, dilated chambers or vessels, or backward flow through regurgitant valves.
|
murmurs
|
|
|
Describe atrial diastole.
|
atria are at rest,allowing blood to pour from body and lungs
|
|
|
Describe atrial systole.
|
atria contract to fill the ventricles after tricuspid and bicuspid valves have opened to allow blood to pass into relaxed ventricles
|
|
|
Describe ventricular diastole.
|
Period during which the ventricles are relaxed and filling.
|
|
|
Describe ventricular systole.
|
ventricles contract and eject blood from heart either into pulmonary system or distal circulation
|
|
|
WHAT IS A DOMINANT LEFT?
|
When the circumflex branch continues around to supply the back side of the heart, including the septum
|
|
|
What is dominant right heart?
|
when the right coronary artery supplies the posterior side of the heart and intraventricular septum (versus the circumflex branch)---in about 80% of people this occurs
|
