ECG Flashcards
What is sinus bradycardia ?
<60BPM
What is sinus tachycardia?
> 100BPM
What part of ECG shows atrial depolarisation?
P wave
What part of the ECG shows ventricle depolarisation?
QRS compelx
What are the four limb ECG and where are they on the body?
Red (AVR) on the right arm
Yellow (AVL) on the left arm
Green (AVF) on the right leg
Black is neutral on right leg
What creates lead 1?
AVR to AVL
What creates lead 2?
AVR to AVF
What creates lead 3?
aVL to AVF
What are the chest electrode placement positions?
1 – 4th Intercostal Space, Rt. Sternal Edge.
V2 – 4th Intercostal Space, Lt. Sternal Edge.
V3 – Midway between V2 & V4.
V4 - 5th Intercostal Space, Mid Clavicular.
V5 – Midway between V4 & V6.
V6 – 5th Intercostal space, Mid Axillary.
What are leads 2,3 and AVF looking at?
Inferior view of the heart
What are V1 and V2 looking at?
Septal view of the heart
Anterior
What are V3 and V4 looking at?
anterior wall
What are lead 1 and AVL looking at?
Superior lateral view of the heart
What are V5 and V6 looking at?
Inferior lateral view of the heart
What do you initially comment on when looking at ECG?
Patient name and DOB
Date of ECG and indication
Quality of ECG and if its 12 lead
Scale
What is the system that should be used when looking ECG?
Rate ? Rhythm ? P wave ? PR interval ? (AV conduction time). QRS Complex interval ? QT interval ? (Ventricular contraction time).
What does one small box horizontally represent?
0.04s
What does one large box horizontally represent?
0.20s
What does one large box vertically represent?
0.5mv
When looking at rhythm strip what are you trying to identify?
Clear P wave
QRS regular or irregular
Is the QRS narrow or broad
What is the normal length of a P wave?
0.11s just less than 3 small squares
What does absent P wave indicate?
AF or nodal rhythm
What is the PR interval?
P wave to start of QRS complex
What is normal size of PR interval?
0.12-0.2
3-5 small squares
What does a short PR interval indicate?
Wolff Parkinson syndrome –> abnormal fast heart rate or it can be normal
What does long Pr interval indicate?
AV block –>1st 2nd or 3rd degree