ekg/ecg vocab Flashcards
P wave
atrial depolarization (contracting)
QRS complex
ventricular depolarization (contracting)
[atrial repolarization, however it’s hidden because of the high amplitude]
T wave
ventricular repolarization (relax)
methods for finding heart rate on ekg/ecg
- 300 / # of big boxes from R wave to R wave
Amplitude
height of wave
.5 - 1 voltage
SA node
pacemaker
steps of movement through heart
SA node
AV node
bundle of his (right and left bundle branches)
septum
apex
purkinje fibers
bifercate
split in two
asystole
a + systole
without + heart rhythm
no heart rhythm
A fib
small bumps (atrial fibrillation)
V fib
huge bumps (ventricular fibrillation)
ekg/ecg
echocardiogram
(measures electricity in heart)
x axis
time
y axis
voltage
small box
0.04 sec
big box
0.2 sec
how to read ekg/ecg
- examine p waves
- measure pr interval (0.12-0.2 sec)
- measure QRS complex (0.06-0.12 sec)
- identify rhythm
- determine heart rate
- interpret strip
PR interval
beginning of P wave to beginning of QRS complex
PR segment
distance between P wave and QRS complex
QRS complex
distance from Q wave to S wave
ST interval
end of QRS complex to end of T wave
ST segment
distance between QRS complex and T wave
arrhythmia
ar + rhythm + ia
without + rhythm + condition
irregular heart rate
tachycardia
tachy + card + ia
rapid + heart + condition
rapid heart rate
epinepherine and nepherephrine
increase heart rate and heart contractility (adrenaline)
alpha and beta receptors
beta blockers
slow heart rate and contractility
