Ch 2 Flashcards
Any detection off of baseline is called
A wave
Another name for base line
Isoelectric
Distance between 2 waves is called a
Segment
The length of a wave and a segment is called a
Interval
This is heat sensitive
Stylus meter
Normal standardization is
1 m/v
Vertical on ECG paper represents
Voltage
Horizontal on ECG paper represents?
Time
How much time is in one small box
.04 sec
How much time is in a large box?
.20sec
Time period when the myocardial cell cannot respond to stimuli is called
Refractory period
Ability of the myocardial cell to depolarize and repolarize is called
Action potential
Part of ECG machine that converts electrical activity into mechanical motion is the
Standardization button
Writing implement on ECG machine is the
Stylus
This represents atrial depolarization
P wave
This represents ventricular depolarization
QRS interval/ complex
This represents ventricular repolarization
T wave
The inherent rate of a sa node is
60-100 bpm
The inherent rate of av node is?
40-60 bpm
The inherent rate of the ventricular myocardial cells are
20-40 bpm
If the sa node fails to fire or slow down and another site begins pacing the heart, it is called
Escape
If another site begins pacing the heart while the sa node is still working, this is called
Irritability
On all sinus ECG’s the initiation of the impulse is where
Sa node
After exercising janes sa node starts to pace her heart at 115 bpm. This is
Sinus tachycardia
