NATIONAL REGISTRY CARDIOLOGY (2025) EXAM QUESTIONS WITH
SOLVED CORRECTLY SOLUTIONS/NEWEST UPDATE
Normal Sinus Rythm - correct answer Rate: 60-100
Rythm: regular/regular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Dysthythmia - correct answer Rate: (any).
Rythm: irregular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Tachycardia - correct answer Rate: 101-149
Rythm: regular/regular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Bradycardia - correct answer Rate: less than 60.
Rythm: regular/regular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Arrest - correct answer Rate: 60-100 (MISSING ONE PQRST).
Rythm: regular/irregular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
,QRS: .12 seconds or less (less than 3 boxes).
SVT - correct answer Rate: 150 +
Rhythm: Regular.
P Shape: (no P waves)
PRI: .12 seconds or less.
QRS: skinny.
Ventricular Tachycardia (MONO) - correct answer Rate: 100+
Rhythm: Regular.
QRS: WIDE, (.12 seconds or greater).
NOTE: think of, "tombstones."
Ventricular Fibrillation - correct answer Rate: 150+
Rhythm: Regular.
P Shape: No P Wave.
QRS: Wide, & bizarre.
NOTE: the ventricles are "fibrillating."
Asystole - correct answer Rate: 0
Rhythm: Regular.
P Shape: NONE, (No P-Wave).
PRI: N/A
QRS: N/A
1st Degree Heart Block
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any.
Rhythm: Regular.
P Shape: Normal.
PRI: PRI's are the SAME LENGTH, the PRI length is constant. (5+ boxes).
, QRS: Normal.
2nd Degree Heart Block Type 1 (Weinkibach)
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any.
Rhythm: Atrial regular, Ventricle Irregular.
P Shape: Normal.
PRI: PRI interval increases until it drops the QRS then the pattern repeats itself.
QRS: irregular.
2nd Degree Heart Block Type 2 (Mobitz 2)
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any,
but often slow.
Rhythm: Regular or Irregular.
P Shape: 1 P wave has no QRS. P wave is REGULAR.
PRI: each PRI is the SAME regards of the length/distance.
QRS: Normal or Wide.
NOTE: Patient needs a pacemaker.
3rd Degree Heart Block (Complete Heart Block)
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any
Rhythm: Regular.
P Shape: P waves are present.
PRI: PRI gaps are ALL DIFFERENT. (Example; Some 1 box, some 3 box's, some 6 boxes, some
gaps are 2 boxes ect.)
QRS: QRS rhythm is regular.
Wandering Atrial Pacemaker (WAP) - correct answer Rate: usually 60-100
Rhythm: Irregular.
P Shape: 3 DIFFERENT shape P waves.
QRS: 0.11 seconds or less.
SOLVED CORRECTLY SOLUTIONS/NEWEST UPDATE
Normal Sinus Rythm - correct answer Rate: 60-100
Rythm: regular/regular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Dysthythmia - correct answer Rate: (any).
Rythm: irregular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Tachycardia - correct answer Rate: 101-149
Rythm: regular/regular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Bradycardia - correct answer Rate: less than 60.
Rythm: regular/regular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
QRS: .12 seconds or less (less than 3 boxes).
Sinus Arrest - correct answer Rate: 60-100 (MISSING ONE PQRST).
Rythm: regular/irregular.
P Shape: upright, round, 1:1, & similar.
PRI: .12-.2 seconds (3-5 boxes).
,QRS: .12 seconds or less (less than 3 boxes).
SVT - correct answer Rate: 150 +
Rhythm: Regular.
P Shape: (no P waves)
PRI: .12 seconds or less.
QRS: skinny.
Ventricular Tachycardia (MONO) - correct answer Rate: 100+
Rhythm: Regular.
QRS: WIDE, (.12 seconds or greater).
NOTE: think of, "tombstones."
Ventricular Fibrillation - correct answer Rate: 150+
Rhythm: Regular.
P Shape: No P Wave.
QRS: Wide, & bizarre.
NOTE: the ventricles are "fibrillating."
Asystole - correct answer Rate: 0
Rhythm: Regular.
P Shape: NONE, (No P-Wave).
PRI: N/A
QRS: N/A
1st Degree Heart Block
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any.
Rhythm: Regular.
P Shape: Normal.
PRI: PRI's are the SAME LENGTH, the PRI length is constant. (5+ boxes).
, QRS: Normal.
2nd Degree Heart Block Type 1 (Weinkibach)
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any.
Rhythm: Atrial regular, Ventricle Irregular.
P Shape: Normal.
PRI: PRI interval increases until it drops the QRS then the pattern repeats itself.
QRS: irregular.
2nd Degree Heart Block Type 2 (Mobitz 2)
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any,
but often slow.
Rhythm: Regular or Irregular.
P Shape: 1 P wave has no QRS. P wave is REGULAR.
PRI: each PRI is the SAME regards of the length/distance.
QRS: Normal or Wide.
NOTE: Patient needs a pacemaker.
3rd Degree Heart Block (Complete Heart Block)
**(The PRI interval is the most important key with heart blocks)** - correct answer Rate: any
Rhythm: Regular.
P Shape: P waves are present.
PRI: PRI gaps are ALL DIFFERENT. (Example; Some 1 box, some 3 box's, some 6 boxes, some
gaps are 2 boxes ect.)
QRS: QRS rhythm is regular.
Wandering Atrial Pacemaker (WAP) - correct answer Rate: usually 60-100
Rhythm: Irregular.
P Shape: 3 DIFFERENT shape P waves.
QRS: 0.11 seconds or less.
