HOAG ECG TEST FOR EASY STUDY AND QUICK REVISION
Normal electrical route in heart - ANSWER SA node, AV node, bundle of
HIS, right and left bundle branches, purkinje fibers
AV node pace if SA isn't working - ANSWER 40-60
If SA and AV aren't functioning, Purkinje fiber pace: ANSWER 20–40
valve order through the heart - ANSWER tricuspid, pulmonic, mitral, aortic
valve
P wave is - ANSWER atrial contraction/depolarization
ANSWER ventricular contraction/depolarization is the QRS wave.
Q wave is - ANSWER first negative deflection following P wave
R wave is - ANSWER 1st positive deflection after P wave
S wave is - ANSWER first negative deflection after the R wave
typical QRS interval - ANSWER 0.04-0.12 seconds
T wave is - ANSWER ventricular relaxation or repolarization
The PR interval is the time between the start of the P wave and the start of the
QRS.
typical PR interval - ANSWER 0.12-0.20 seconds
ST segment is - ANSWER not tested, but might be harmful if it's raised or
depressed
QT interval is - ANSWER beginning of QRS complex to end of T wave
, typical QT interval - ANSWER 0.36-0.44 seconds, but adjusted for heart rate
small box = - ANSWER 0.04 seconds
huge box = - ANSWER 0.20 seconds
6 second tracing method - ANSWER obtain 6 second tracing, count the R
waves and multiply by 10
what is 6 second tracing method excellent for - ANSWER erratic heart beat
300 technique - ANSWER count number of huge boxes between 2 R waves
and split into 300
1500 method: ANSWER divides the number of tiny boxes between two R
waves into 1500.
ventricular tachycardia definition - ANSWER originating in 1 ectopic location
in ventricles creating excessively wide and strange QRS complexes abrupt start
and termination
V tach rate and shape: ANSWER normal and monomorphic 110-250
V tach and PVCs - ANSWER VT exists if 3 or more consecutive PVCs are
present at a rate of >100 bpm
V fib definition: The ventricles quiver (fibrillate) due to the fast, chaotic firing
of several ectopic locations in the ventricles.
V fib shape - ANSWER severely erratic rhythm no QRS
Idioventricular form and rate: ANSWER broad, uneven QRS with extended
intervals; sluggish pace; no P waves
The absence of electrical activity in the ventricles is known as asystole or
ventricular stillness.
flat line or simply P waves
1st degree heart block definition - ANSWER extended PR interval larger than
0.20 seconds
2nd degree heart block type 1 - ANSWER steady lengthening of PR interval,
Normal electrical route in heart - ANSWER SA node, AV node, bundle of
HIS, right and left bundle branches, purkinje fibers
AV node pace if SA isn't working - ANSWER 40-60
If SA and AV aren't functioning, Purkinje fiber pace: ANSWER 20–40
valve order through the heart - ANSWER tricuspid, pulmonic, mitral, aortic
valve
P wave is - ANSWER atrial contraction/depolarization
ANSWER ventricular contraction/depolarization is the QRS wave.
Q wave is - ANSWER first negative deflection following P wave
R wave is - ANSWER 1st positive deflection after P wave
S wave is - ANSWER first negative deflection after the R wave
typical QRS interval - ANSWER 0.04-0.12 seconds
T wave is - ANSWER ventricular relaxation or repolarization
The PR interval is the time between the start of the P wave and the start of the
QRS.
typical PR interval - ANSWER 0.12-0.20 seconds
ST segment is - ANSWER not tested, but might be harmful if it's raised or
depressed
QT interval is - ANSWER beginning of QRS complex to end of T wave
, typical QT interval - ANSWER 0.36-0.44 seconds, but adjusted for heart rate
small box = - ANSWER 0.04 seconds
huge box = - ANSWER 0.20 seconds
6 second tracing method - ANSWER obtain 6 second tracing, count the R
waves and multiply by 10
what is 6 second tracing method excellent for - ANSWER erratic heart beat
300 technique - ANSWER count number of huge boxes between 2 R waves
and split into 300
1500 method: ANSWER divides the number of tiny boxes between two R
waves into 1500.
ventricular tachycardia definition - ANSWER originating in 1 ectopic location
in ventricles creating excessively wide and strange QRS complexes abrupt start
and termination
V tach rate and shape: ANSWER normal and monomorphic 110-250
V tach and PVCs - ANSWER VT exists if 3 or more consecutive PVCs are
present at a rate of >100 bpm
V fib definition: The ventricles quiver (fibrillate) due to the fast, chaotic firing
of several ectopic locations in the ventricles.
V fib shape - ANSWER severely erratic rhythm no QRS
Idioventricular form and rate: ANSWER broad, uneven QRS with extended
intervals; sluggish pace; no P waves
The absence of electrical activity in the ventricles is known as asystole or
ventricular stillness.
flat line or simply P waves
1st degree heart block definition - ANSWER extended PR interval larger than
0.20 seconds
2nd degree heart block type 1 - ANSWER steady lengthening of PR interval,
