Heart
Heart
EKG
EKG
EKG
100
diameter of coronary artery
1/8 inch
100
what part is #14
100
Fourth intercostal space at the right sternal border
V1
100
Left midaxillary line on the same horizontal plane as V4 and V5
V6
100
this interval measures the time from the initial depolarization of the atria to the initial depolarization of the ventricles and reflects a physiological delay in AV conduction imposed by the AV node
PRI
200
this encloses the heart
pericardial sac
200
what part is #2
200
Fourth intercostal space at the left sternal border
V2
200
represents the interval between ventricular depolarization and repolarization.
ST segment
200
what is this on the EKG
300
what part of the heart is #3
300
what part is #7
300
Halfway between leads V2 and V4
V3
300
represents atrial depolarization
P wave
300
what is this on the EKG
400
what part of the heart is #1
400
Flow of blood from body tissue to the heart and then from the heart back to body tissues
SYSTEMIC CIRCULATION
400
Fifth intercostal space in the midclavicular line
V4
400
represents ventricular depolarization
QRS
400
Leads and electrodes are different:
electrodes are the "stickers" and leads are the
"pictures" of the heart from various directions
500
what structure is #11
500
Once the oxygen diffuses across the alveoli, it enters the bloodstream and is transported to the tissues where it is unloaded, and carbon dioxide diffuses out of the blood and into the alveoli to be expelled from the body
TRANSPORTATION
500
Left anterior axillary line on the same horizontal plane as V4
V5
500
represents repolarization of the ventricles
T
500
Standard calibration or gain is set at
10 mm/mV