ECGs Flashcards
what does the P wave represent
wave of atrial depolarisation that spreads from SA node throughout atria
(atrial depolarisation)
how long is an normal P wave meant to be
between 0.08 - 0.1 secs
what does the PR interval represent
time between onset of atrial depolarisation and ventricular depolarisation
how long is a normal PR interval meant to be
between 0.12 - 02 secs
what does the QRS complex represent
ventricular depolarisation
what is a normal QRS complex duration
0.06 - 0.1 secs
what does the ST segment represent
period which the entire ventricle is depolarised
what does the T wave represent
ventricular repolarisation (is longer than period of depolarisation)
what does a U wave represent when present, and where would it be seen
represents the last remnants of ventricular repolarisation
would be seen just after T wave
what does the QT interval represent
time for both ventricular depolarisation and repolarisation to occur
what is the QT intervals normal range, and what does it depend on
between 02 - 0.4 secs
depends on HR
