ECG Flashcards
What does the p wave correspond to in regards to electrical conductance
Sino atrial node conducting current down atria and internodal tracts (atrial systole)
What does the qrs complex correspond to in regards to electrical conductance
Conduction through left and right bundles to purkinje fibres causing ventricular contraction
What does the t wave correspond to in regards to electrical conductance
Repolarisation of ventricles
Where are limb leads placed
Both hands and legs (feet)
What are limb leads labelled as
AVR (RA), AVL (LA), AVF (LL), N (RL)
Which 3 limb leads are used in measurement
AVR, AVL and AVF from ra, la and ll forming a triangle
Lead 2 direction and deviation
Axis deviation - change in heart position and electrical conduction position
Shows right and left axis deviation
What position is lead 2 placed
45 degree down to the right
What does lead 2 measure
P wave as it passes through san and avn
Loss of p wave
Atrial fibrillation (lead 2)
Saw tooth pattern
Atrial flutter (lead 2)
Delay in conduction of pr interval (long)
1st degree heart block (lead2)
Intermittent cinduction of pr interval
2nd degree heart block
Interpreting ecg
Rate rhythm and axis
Rate calculation
300 / large squares
