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1. Sinus Bradycardia - ANSWER Regularity: atrial and ventricular rate are
regular
Rate: < 60 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
2. Sinus Tachycardia - ANSWER Regularity: atrial and ventricular rate are
regular
Rate: >100 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
3. Atrial Tachycardia - ANSWER Regularity: R-R intervals are regular,
overall rhythm is regular
,Rate: Atrial and ventricular rates are the same. The rate is usually between 160-
250 beats/min
P wave: There is one p wave in front of every QRS. The P waves may appear
different than a sinus P wave due to the rapid rate. They can be notched or
flattened, and in some cases the P wave may be lost within the QRS complex
PRI : 0.12 to 0.20 seconds, PRI is consistent, but may not be easily measured
due to the rate
QRS: 0.06 to 0.10 seconds and all are uniform
QTI: usually indiscernible
T wave: usually indiscernible
4. Supraventricular Tachycardia (SVT) - ANSWER Regularity: atrial and
ventricular rate regular
Rate: greater than 160 beats per minute, (can be 200 beats per minute or more)
P wave: abnormal, small and upright, may be hidden in QRS if rate is very fast
PRI : less than 0.12 seconds, if present
QRS: typically less than 0.06 - 0.08 seconds, very narrow
QTI: indiscernible
T wave: indiscernible
5. Paroxysmal Supraventricular Tachycardia (PSVT) - ANSWER Paroxysmal
refers to a rhythm that starts and stops suddenly
6. Premature Junctional Contractions - ANSWER Regularity: underlying rate
is regular except for early beat
Rate: determined by the underlying rhythm
P wave: upright, smooth, round and uniform shape, EXCEPT for the early beat,
it will be inverted before or after the QRS or missing
, PRI : 0.12 to 0.20 seconds normal in the underlying rhythm, <0.12 seconds in
the early if it precedes the QRS
QRS: 0.06 to 0.10 seconds and all are uniform
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
7. Junctional Rhythm - ANSWER Regularity: atrial and ventricular rate is
regular
Rate: 40 to 60 beats per minute
P wave: inverted or absent, may be before, within or after the QRS
PRI : less than 0.12 seconds if the P wave precedes the QRS complex
QRS: 0.06 to 0.10 seconds and usually normal
QTI: 0.36 to 0.46 seconds
T wave: usually normal, upright, smooth and round uniform shape
8. Accelerated Junctional Rhythm - ANSWER Regularity: atrial and
ventricular rate is regular
Rate: > 60 but less than 100
P wave: inverted or absent, may be before, within or after the QRS
PRI : less than 0.12 seconds if the P wave precedes the QRS complex
QRS: 0.06 to 0.10 seconds and usually normal
QTI: 0.36 to 0.46 seconds
T wave: usually normal, upright, smooth and round uniform shape
9. Junctional Tachycardia - ANSWER Regularity: atrial and ventricular rate is
regular
Rate: >100 beats per minute