EKG and Heart Flashcards
The Right Atrium receives _______ blood from the ____ and _____ vena cava.
Deoxigenated blood from the superior and inferior vena cava.
The Left Atrium receives _________ blood from the _______ veins.
oxigenated blood from the pulmonary veins (the only veins in body that carry oxigenated blood.)
The Right Ventricle receives blood from the __________ and sends __________ blood through the _____ artery to the _______.
Right Artium and sends deoxigenated blood through the pulmonary artery to the Lungs. (for co2/o2 exchange - Pulmonary circuit)
The Left Ventricle receives ____ blood from the _____ Atrium and sends it through the _____ valve into _____.
Oxigenated blood from the Left atrium. Sends it through the aortic valve into aorta. (Where it branches off into smaller arteries - systemic circuit.)
EKG graph vertical axis represents _______.
Gain or amplitude.
EKG graph horizontal axis displays ________.
Time.
Leads I, II, and III are _____________.
Bipolar
Leads AVL, AVR, and AVF are ______.
Unipolar.
Precordial lead wires are located where?
On the chest in front of the heart.
White lead goes where?
Right arm.
Black lead goes where?
Left arm.
Red lead goes where?
Left leg.
Green lead goes where?
Right leg.
Precordial leads can be what color?
brown or multi-colored.
V1 color and placement:
Red - Right side of sternum at 4th intercostal space.
V2 color and placement:
Yellow - L side of sternum across from V1 at 4th intercostal space.
V3 color and placement:
Green - Left side of the chest midway between V2 and V4 (place V4 first)
V4 color and placement:
Blue- Left side of chest, 5th intercostal space, midclavicular (nipple) line.
V5 color and placement:
Orange - Left side of chest, 5th intercostal, anterior axillary line (next to V4).
V6 color and placement:
Purple - Left side of chest, 5th intercostal, mid axillary line (next to V5)
P wave is :
First in cardiac cycle, shows depolarization (contraction) of atria.
QRS Wave or QRS Complex is:
The 2nd wave in the cardiac cycle representing ventricular depolarization (contraction.)
Repolarization is :
relaxation of heart muscles.
T wave is:
Third wave in cardiac cycle representing ventricular repolarization.
Bundle of His is:
A collection of fibers that conduct the electrical impulses from the AV node to the ventricular septum.
Purkinje fibers are:
The fingerlike projections that spread through the ventricular muscle and initiate ventricular contraction.
P-R Interval is :
The length of time from atrial to ventricular depolarization
Source of electrical conduction and what makes th “P” wave in EKG:
SA Node (sino-atrial ) makes sinus rhythm
The GAIN of the paper on an EKG (If asked to calculate an image)
10 mm/mv (can be turned down to 5mm/mv) PAPER DOES NOT SLOW …Instrument spreads out rhythm
Qt interval is:
The length of time from the beginning of ventricular depolarization to end of ventricular repolarization.
ST segment is:
The length of time from end of ventricular depolarization to the beginning of ventricular repolarization.
Somatic Tremor is:
Irregular spikes in EKG from patient movement/shivering/trembling.
Wandering baseline in EKG is a result of:
Poor electrode connection.
Interrupted baseline in EKG is due to:
Disconnected/broken lead wire.
If the QRS appears wide and bizarre in the EKG you can suspect:
Premature ventricular Contractions (PVC’s) or ventricular arrhythmias.
What is the SPEED of EKG paper?
25 mm/sec (can be turned down to 50 mm/sec) PAPER DOES NOT SLOW. Instrument spreads out.
J point in EKG is:
Where s connects to T (looks like a “J”)
Normal PR Interval time is:
0.12 - 0.2 seconds.
Normal QRS Interval time is:
0.04 - 0.10 seconds.
Normal QT Interval time is:
0.30 - 0.52
1500 Method of Calculating Ht Rate is:
SMALL horizontal boxes are counted (as 1 each) between two R waves. Then 1500 is divided by that number to get Ht rate.
300 Method (Sequence) of calculating Ht rate is:
Memorize sequence 300, 150, 100, 75, 60. Count BIG boxes between two R waves, using this sequence. That is HT rate.
6 Second Method of calculating HT rate is:
Use a 6 second strip. Count each QRS Interval in the strip. That number is the HT rate.
Tabs on arms and chest point _____. On legs point _____.
Down. Up.
