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EKG rhythms questions and answers
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Normal Sinus Rhythm ✔✔Has an upright P wave identical throughout strip
PR interval is <0.20 second
QRS complexes are identical & no longer than 0.12 second
ST segment is flat
RR interval is regular & heart rate is 60 to 100/min
PAC's ✔✔Rate: depends on the rhythem
Rhythm: irregular due to premature beat
p waves: appear different from underlying rythem precedes QRS complex, may be lost in T wave of previous beat.
QRS complexes: of normal duration and all look alike
PR intervals: normal or shortned
Sinus Tachycardia ✔✔Recognized when heart rate exceeds 100/min at rest
Each QRS complex is preceded by P wave
Sinus Bradycardia ✔✔Heart rate is less than 60/min
Each QRS is preceded by P wave
PR interval & QRS complex are normal
Junctional/Nodal ✔✔P wave: inverted or absent. may follow QRS complex.
PR: interval (short and less than 0.12 seconds)
QRS: usually 0.06-0.10 seconds QRS complexes should be normal but they can be wide or unusual looking
Accelerated Junctional ✔✔Rate: 40-60 BPM
rhythm: regular
P waves: inverted; may appear before QRS complex
QRS complexes: of normal duration and all look alike
PR intervals: if present will be shorter than normal
Atrial Fib ✔✔Results when atrial muscle quivers in irregular pattern; no true P waves are seen
Ventricular rate may be slow & irregular
*PR intervals & RR intervals remain regular with no correlation with one another
Ventricular Tachycardia ✔✔*Represent run of 3 or more PVCs in a row
*Easy to recognize as series of wide QRS complexes with no preceding P wave
*Ventricular rate is usually 100 to 250/min
Ventricular Fib ✔✔ECG shows grossly irregular fluctuations with zigzag pattern
Asystole ✔✔absence of any cardiac activity
Wandering Atrial Pacmaker Rhythm ✔✔Rate: usally normal
Rythem: slightly irregular
P waves: change in appearance, one precedes each QRS complex. At least three different p-wave configurations are needed to diagnose wandering atrial pacemaker.
QRS complex: of normal duration and all look alike
PR intervals: varies
Couplet ✔✔two pvcs in a row
Bigeminy ✔✔every other beat is a PVC
Trigeminy ✔✔every third beat is a PVC
Idioventricular (agonial rhythm) ✔✔Rate: 20-40 bpm
rythem: regular
p waves: are not visible
QRS: are wide (greater the 0.12 seconds in duration) and bizzare in apperence
pr intervals: are absent
PVC'S ✔✔rate: depends on underlying rythem
rhythem:irregular due to premature beat
p-waves: of are not visable as they are hidden in the QRS complex
QRS: of PVC's are wide (greater than 0.12 seconds in duration) and bizzare in apperence
PR intervals: of PVC's are absent
