Boxes
.04
What is the preferred method for calculating rate of a regular rhythm?
1500 method
The area between two specific points on the ecg is called?
interval
A "normal" PRI is what?
less than or equal to .20 seconds
What are the three qualities of a normal (sinus) p-wave?
Upright, uniform and in front of a QRS
1 "large" box is how many small boxes? And is how long?
five small boxes. .20
What is the preferred method for calculating rate of an irregular rhythm?
6 second method
The area on an ecg between two waveforms is called a what?
segment
a "wide" QRS is what?
greater than or equal to .12
What delays the signal from the sinus long enough for the ventricles to fill with blood
AV node
five
Can you use the 6 second method to calculate an accurate rate of a regular rhythm
YES!
the QRS ends at the beginning of the st segment which is known as what?
J point
At Biotel we measure and notate a pause at what duration?
greater than or equal to 2.0 seconds
T/F a QRS will always have a q, r and s wave
False
how many big boxes does it take to make 6 seconds?
30
all heart rates over 100 bpm are considered what?
tachycardic
the interval that includes both the p-wave and pr segment
PRI
T/F "regular" rhythms be off (early or late) by as much as 3 small boxes
False
What can sometimes be seen following every t wave?
u wave
T/F one small box is 1 mm
true
describe the steps by which you would use the 1500 method to find a heart rate?
from the beginning of the p wave to the end of the t or u wave is known as what?
One complete "normal" heart beat
inherent rate of the SA node is what?
60-100
QRS complex represents what?
ventricular depolarization and contraction