ecg Flashcards
Primary Pacemaker
SA node
The route electrical impulses take to get to the remaining parts of the myocardium
Bundle of His
Delays the electrical impulses, allowing the atria to complete the contraction
AV node
if the electrical impulse is fired off in the SA node, the heart rate should be between
60-100 ( normal heart rate)
a slowed heart rate is referred to as
Bradycardia
V1 and aVR should be _________ on the tracing if your patient is connected properly
Negative
the QRS complex is measured from where on a rhythm strip
1st deflection after the P wave to where the S wave meets the isoelectric wave
The term used to describe the recovery period before the next heart beat
Repolarization
A period of Zero electrical activity
Isoelectric line
represents the Atrial Depolarization
PR interval
ST Segment & T wave represents Ventricular
Repolarization
The QRS complex represents
Ventricular Depolarization
If Electrical impulses start in the AV node , the heart rate will reflect
Bradycardia (delayed heart rate)
What is measured from the beginning of the QRS complex to the end of the T wave.
QT interval
A perfect Waveform is referred to as
Normal Sinus Rhythm
What is ECG paper sensitive too
Heat
Refer to what guide to troubleshoot the machine?
Manufacturers
The calibration mark should be ___ large boxes high or ___small boxes high or.
2 large or 10 small
PR interval is measured from the
beginning of the P wave to the beginning of the QRS complex
Where in the waveform would you look for an atrial arrythmia?
PR interval
Where on the waveform would you look for a Ventricular Arrhythmia?
PR interval
A normal Heart Rate is ?
60-100bpm
how many seconds does a normal, routine ECG last?
6 seconds
you can determine the patient’s rhythm by measuring the space between____ waves
R
What _______ is measured from the beginning of the QRS complex to the end of the T wave?
QR Interval