Label the Heart
Label #8
Aorta
What is the outermost layer of the heart called?
epicardium
What does RCA stand for?
right coronary artery
Which node initiates the heart's electrical impulse?
SA node
Where should the white lead be placed?
under right clavicle
Identify #13
Left Ventricle
Which valve has two names?
Mitral/Bicuspid valve
What is the primary function of coronary circulation in the human body?
to supply oxygenated blood to the heart muscle
What is the primary role of the AV node?
delay the impulse and cause ventricles to contract
Name one thing that should be checked during daily inspection of EKG equipment?
machine, lead wires, electrodes, supplies
Label #7
Posterior Descending
Which valve separates the left atrium from the left ventricle?
Mitral/Bicuspid valve
What are the branches of the LMCA?
Left Circumflex Artery and Left Anterior Descending Artery
What's the function of the Bundle of His?
transmit electrical impulses from the atrioventricular node (AV node) to the ventricles of the heart
What does each horizontal square on standard EKG paper represent in time?
.04 seconds
Label #4
Right Coronary Artery
First step of coronary circulation.
superior and inferior vena cava
Which blood vessels specifically supply oxygenated blood to the myocardium?
coronary arteries
When does depolarization occur?
purkinje fibers
What regulates the height of the waveforms on the EKG tracing?
sensitivity
Label #12
Circumflex Artery
Name the four chambers of the heart in order of blood flow.
How does the heart ensure its own blood supply during systole, when the heart muscle contracts?
coronary perfusion occurs during diastole
What causes resistance to ischemia?
when LPF receives additional blood from right coronary artery
Required number of angles to record heart activity.
12