mitral stenosis murmur possible ECG changes
bifid P wave in mitral stenosis
Heart failure possible ECG changes
atrial fibrillation, Q waves
drug overdose possible ECG changes
Prolonged QT interval
hyperkalaemia ECG changes
tented T waves
the sternal angle corresponds with the
level of the second rib
25mm horizontally respresents
1 second of recording
Left arm
Right arm
Left leg
Right leg
LA - yellow
RA - Red
LL - green
RL - black/neutral.
P wave duration:
≤ 120 milliseconds
PR interval duration:
120 to 200 milliseconds (3–5 small squares)
QRS complex duration:
≤ 120 milliseconds