ECG's Flashcards
What is the QRS complex?
Ventricular depolarisation
Masks atrial repolarisation
What is the T wave?
Ventricular repolarisation
What is the PR interval?
Largely AV node delay
What is the ST segment?
Ventricular systole
What is the TP interval?
Diastole
What does positive deflection in an ECG mean?
Depolarisation towards electrode
What does negative deflection in an ECG mean?
Depolarisation away from electrode
What is the paper speed of an ECG?
25 mm per second
Which limb is aVR looking from?
Right arm
Which limb is aVL looking from?
Left arm
Which limb is aVF looking from?
Left leg
Where is V1 placed?
Right sternal edge
4th intercostal space
Where is V2 placed?
Left sternal edge
4th intercostal space
Where is V3 placed?
Halfway between V2 & V4
Where is V4 placed?
Apex beat (5th intercostal space midclavicular line)