What is the approximate diameter of the coronary arteries?
1/8 inch
How many electrodes are in a 12 lead EKG?
10 electrodes
What happens when the atria contract?
The blood is squeezed into the ventricles
What is another name for leads aVR, aVF, and aVL?
Augmented leads
What is the upper border of the heart, which is broad in shape?
base of the heart
Below which rib is the base of the heart located?
2nd
What is the normal speed for an EKG to run?
25mm/sec
A characteristic of heart cells where they can start electrical impulses automatically.
Automaticity
Name 2 examples of SVT.
Afib
Aflutter
WPW
Atrial Tach / FAT / MAT
Junctional Tach
AVRT / AVNRT
Why is the left ventricle the largest chamber in the heart?
because it has the job of pumping out blood to all parts of the body
What is the normal standard setting for the EKG?
10 mm/mv
The normal sinus rhythm has a rate of how many beats per minute?
60-100
1. Plaque builds up in the heart.
2. A piece breaks off.
3. The piece travels until it gets to somewhere it cannot get through.
4. This blockage causes a _____ _____.
heart attack
Tricuspid valve and Bicuspid valve are also called what?
AV Valves
What is the specialized conduction tissue found in the right atrium, which is the electrical connection between atria and ventricles?
AV node
What does each small square on an EKG represent?
.04 seconds
What is the difference between agonal and asystole on an EKG?
one is a flat line while the other is less than 20 beats per minute
When does the U wave appear, if it appears?
after the T wave
What is another name for the resting phase on the EKG?
baseline / polarization / isoelectric
What RHYTHM is this?
Afib
When measuring the height of peaks in an EKG what does each large square represent?
5mm x 5mm
When the heart rate goes down to 40-60 beats per minute where is the impulse usually generated from?
AV node
What can ischemia cause in the heart?
angina and infarction
What is the valve between the left atrium and left ventricle?
bicuspid (mitral) valve
What ECTOPY is this showing?
1 PAC