EKG Stuff Flashcards
What 5 things do you want to check for first with an EKG?
Rate, Rhythm (regular or not) P-waves PR interval, Abnormal QRS complexes
Name the ways to calculate rate
6 second interval
300 divided by number of big boxes (300,150,100 etc)
When do you want to use the 6 second interval method when calculating rate?
If the rhythm is irregular (sinus arrhythmia, etc)
What is a normal rate?
60-100 bpm
What is it called when the rhythm is irregular?
arrhythmia or dysrhythmia
When the rate is below 60 what is it called
bradycardia
When the rate is above 100 what is it called
tachycardia
When do you use the word sinus in the rhythm
When there is a p-wave for every QRS that looks normal and comes from the SA node
Name the pathway for conduction system in the heart
SA node AV node Bundle of his Bundle branches Purkinje fibers
Where is the SA Node and what does it do?
Upper right atria
It initiates the heart beat
influenced by vagus nerve
Where is the AV node and what does it do?
In between the right atria and ventricle at the floor of the right atria. It causes a delay in electrical impulse so the rest of the signals in the atria can meet up before going onto the ventricles.
It can act as a pacemaker if the SA node isn’t working
In a ECG waveform what is happening at the p-wave?
Atrial depolarization
In an ECG waveform what”s happening at QRS complex?
Ventricular depolarization
atrial re-polarization is hidden in this wave
In an ECG waveform what’s happening at the T wave?
Ventricular repolarization
What is a PR interval?
Measurement from beginning of P wave to beginning of QRS complex.
