ECG Made Easy 2 Flashcards
Right bundle branch block looks like?
‘M’ in V1 ‘RSR’ pattern
Left bundle branch block looks like?
‘W’ in V1
‘M’ in V6
what is the average direction of depolarization of ventricles?
left to right
what is left axis deviation usually due to?
left anterior fascicular block
left anterior hemiblock
what is bifascicular block?
RBBB and left axis deviation from a left anterior fascicular block
does a RBBB affect cardiac axis?
Nope, still normal cardiac axis
septum is depolarized from which direction?
left to right
what pattern in RBBB?
‘RSR’ in V1
what pattern in LBBB?
‘M’ in V6
Width of QRS complex?
120ms
less than 3 squares
how do ventricular rhythms spread?
slower, and through purkinje
Wide QRSs and inverted ‘t’ waves
what are escape rhythms?
ventricular origins of depolarization
what is nodal escape?
when region around AV node takes over pacing
what is an ectopic beat?
depolarization originating in abnormal location
atrial extrasystoles have?
abnormal P wave
junctional extrasystole has?
no P wave at all
ventricular extrasystoles look? important?
wide, any shape,
common and usually not important
what is R on T phenomenon?
when ventricular systoles occur at peak of T-waves
T waves look how in supraventricular beats vs. ventricular beats?
supra: same way up
ventricular beats: inverted T waves
P wave affected in ventricular extrasystole?
Nope, SA node not affected
P wave affected in supraventricular extrasystole?
Yes it resets the cycle
P wave affected in supraventricular extrasystole?
Yes it resets the cycle
atrial tachycardia faster than how many beats/min?
> 150beats/min
atrial flutter rate is greater than?
250/min
where to look to see atrial flutter?
Lead II
aVR
aVF
QRS is?
onset of conduction through the ventricles
QT?
The time the ventricle is contracting
