Chapter 13 - the heart Flashcards
- abnormally rapid heart rate
- heart rate greater than 100
Tachycardia
- covey heart sounds to the examiner’s ear
- can detect a murmur
function of the stethoscope
- abnormally slow heart rate
- less than 60 beats per minute
bradychardia
- a heart sound resulted from ventricular filling
- considered normal
functional murmur
symptoms indicating activation of the Sympathetic division
- increased heart rate
- dilated pupils
- sweating
- increased alertness
- impulses travelling from SA node to AV node
- SA node-Bundle of HIS-Purkinje fibers
- a group of specialized cells that conduct electrical impulses in the heart
- impulses travel from the sinoatrial node (SA node) to the atrioventricular node (AV node)
Internodal pathway
conducting cells to help determine heart rate
Sinoatrial (SA) nodes
factors contributing to cardiac output
stroke volume x heart rate
heart parts contracting during systole and diastole
ventricles contract during systole, and atria contract during diastole
circulation of blood within the blood vessels of the heart muscle
Coronary circulation
a vein that collects blood from the heart muscle and drains it into the right atrium
coronary sinus
Positioned at the exits of the heart’s ventricles
semilunar valves
located in the pulmonary artery
pulmonary valve
located in the aorta
aortic valve
- located between the right atrium and right ventricle
- also known as the right atrioventricular valve
tricuspid valve
wall separating the right and left atria
interatrial septum
chambers of the heart
- right atrium
- right ventricle
- left atrium
- left ventricle
right side of heart pumps blood to…
lungs (pulmonary circulation)
left side pumps blood to…
rest of the body (systemic circulation)
muscular layers of the heart
- epicardium
- myocardium
- endocardium
membranes surrounding the heart
Pericardium (outer fibrous layer and inner serous layer)
specialized cell junctions in cardiac muscle that allow for rapid conduction of electrical impulses
intercalated disks
test using sound waves to produce images of the heart
Echocardiogram
test that measures the electrical activity of the heart
Electrocardiogram
using X-rays to visualize deep structures
Fluoroscopy
Imaging test that uses X-rays to view blood vessels
Angiogram
Branches from the aorta
coronary arteries
pulmonary artery carries…
deoxygenated blood from the heart to the lungs
pulmonary vein carries…
oxygenated blood from the lungs to the heart
Function of the coronary sinus
collects blood from the myocardium
Normal pacemaker of the heart
Sinoatrial (SA) node, located in the right atrium
Does activating the parasympathetic nervous system increase or decrease heart rate?
activating the parasympathetic nervous system decreases heart rate
Closing of the AV valves
LUBB sound
closing of the semilunar valves
DUBB sound
atria are the…
blood receiving
ventricle are the…
blood pumping
right side of heart pumps to…
the lungs
left side of heart pumps to…
heavily oxygenated blood to all parts of the body
