EKG Components Flashcards
Normal paper speed is..
25 mm/sec
Normal gain (height of waveform is)?
10 mm/mv
A large box on EKG paper is..
5 mm
A small box on EKG paper is..
1 mm
What is depolarization?
Contraction
What is repolarization?
Relax
What node does depolarization and repolarization come from?
Sinoatrial node (sa node)
What is the Pwave?
Atrial depolorization and repolarization.
What does the QRS complex do?
Represents ventricular depolarization (contraction).
What does the Twave do?
Represents ventricular repolarization (relax).
What is the PR interval’s normal rate?
12 to .20 secs
What is QRS interval’s normal duration?
0.06 to .10 secs
Where is V1 placed on the chest?
Fourth intercostal space (ICS), Right side of sternum.
Where is V2 placed on the chest?
Fourth ICS, left of sternum, Directly across from V1.
Where is V3 placed on the chest?
Midway between V2 and V4 (below V2 and a little to the right)