APEX EKG 2026 TEST PAPER EXAM QUESTIONS AND
ANSWERS RATED A+
✔✔First Degree AV Heart Block rhythm - ✔✔regular
✔✔First Degree AV Heart Block p wave - ✔✔normal preceding every QRS
✔✔First Degree AV Heart Block PR interval - ✔✔greater than 0.20
✔✔First Degree AV Heart Block QRS complex - ✔✔less than 0.12
✔✔Second Degree AV block Mobitz Type I "Weneckebach" - ✔✔PR interval increases
until QRS dropped
✔✔Second Degree AV block Mobitz Type I "Weneckebach" rate - ✔✔dependent on
underlying rhythm
✔✔Second Degree AV block Mobitz Type I "Weneckebach" rhythm - ✔✔usually
irregular
✔✔Second Degree AV block Mobitz Type I "Weneckebach" p wave - ✔✔normal
appearance. more P's then QRS complexes
✔✔Second Degree AV block Mobitz Type I "Weneckebach" PR interval -
✔✔progressive lengthening until blocked and QRS drops
✔✔Second Degree AV block Mobitz Type I "Weneckebach" QRS complex - ✔✔less
than 0.12
✔✔Second Degree AV block Mobitz Type II - ✔✔PR interval same when present,
dropped QRS's
✔✔Second Degree AV block Mobitz Type II rate - ✔✔atrial rate faster than ventricular
rate
✔✔Second Degree AV block Mobitz Type II rhythm - ✔✔irregular
✔✔Second Degree AV block Mobitz Type II p wave - ✔✔intermittent conduction. More
P's than QRS complexes
✔✔Second Degree AV block Mobitz Type II PR interval - ✔✔consistent PR interval for
conducted beats
, ✔✔Second Degree AV block Mobitz Type II QRS complex - ✔✔may be wider than
normal
✔✔Third degree AV block (complete heart block) - ✔✔p waves march out, QRS march
out, no relation between P's and QRS
✔✔Third degree AV block (complete heart block) rate - ✔✔atrial: 60-100
vent: less than 40
junct: greater than 40
✔✔Third degree AV block (complete heart block) rhythm - ✔✔atrial and vent rhythms
are independent, usually regular but dissociated
✔✔Third degree AV block (complete heart block) p wave - ✔✔normal but not related to
QRS. More P waves than QRS complexes
✔✔Third degree AV block (complete heart block) PR interval - ✔✔no pr interval due to
dissociation
✔✔Third degree AV block (complete heart block) QRS complex - ✔✔depends on level
of escape rhythm
✔✔Pulseless Electrical Activity (PEA) - ✔✔Depends on the rhythm for all categories. A
rhythm is present but NO PLUSE.
✔✔Asystole (ventricular standstill) - ✔✔none in all four categories. No electrical activity
present.
✔✔ST Segment (elevated/depressed) - ✔✔A normal ST segment is usually flat or
isoelectric. It is measured from the end of the QRS to the beginning of the T wave. A
change in the ST segment (whether depressed or elevated) is generally caused by
myocardial ischemic conditions.
✔✔Artifact - ✔✔Bizarre chaotic waveforms. May be by shivering, hiccups or other
movement instead of motions. Check electrodes. Monitor gain up.
✔✔Paced Rhythms - ✔✔There are different types of pacemakers depending on what
the chamber being paced. Spikes should appear before p wave if atrial, before the QRS
if ventricle or before both if both are paced. a Bi-ventricular pacemaker paces both
ventricles and is for heart failure and will have a biphasic spike. Pacemakers can also
have different types of settings so it can be pacing asynchronous or on demand.
✔✔Failure to Sense - ✔✔Sense is the ability of pacemaker to recognize and respond to
cardiac activity. Under sensing occurs when pacer fails to recognize intrinsic activity
ANSWERS RATED A+
✔✔First Degree AV Heart Block rhythm - ✔✔regular
✔✔First Degree AV Heart Block p wave - ✔✔normal preceding every QRS
✔✔First Degree AV Heart Block PR interval - ✔✔greater than 0.20
✔✔First Degree AV Heart Block QRS complex - ✔✔less than 0.12
✔✔Second Degree AV block Mobitz Type I "Weneckebach" - ✔✔PR interval increases
until QRS dropped
✔✔Second Degree AV block Mobitz Type I "Weneckebach" rate - ✔✔dependent on
underlying rhythm
✔✔Second Degree AV block Mobitz Type I "Weneckebach" rhythm - ✔✔usually
irregular
✔✔Second Degree AV block Mobitz Type I "Weneckebach" p wave - ✔✔normal
appearance. more P's then QRS complexes
✔✔Second Degree AV block Mobitz Type I "Weneckebach" PR interval -
✔✔progressive lengthening until blocked and QRS drops
✔✔Second Degree AV block Mobitz Type I "Weneckebach" QRS complex - ✔✔less
than 0.12
✔✔Second Degree AV block Mobitz Type II - ✔✔PR interval same when present,
dropped QRS's
✔✔Second Degree AV block Mobitz Type II rate - ✔✔atrial rate faster than ventricular
rate
✔✔Second Degree AV block Mobitz Type II rhythm - ✔✔irregular
✔✔Second Degree AV block Mobitz Type II p wave - ✔✔intermittent conduction. More
P's than QRS complexes
✔✔Second Degree AV block Mobitz Type II PR interval - ✔✔consistent PR interval for
conducted beats
, ✔✔Second Degree AV block Mobitz Type II QRS complex - ✔✔may be wider than
normal
✔✔Third degree AV block (complete heart block) - ✔✔p waves march out, QRS march
out, no relation between P's and QRS
✔✔Third degree AV block (complete heart block) rate - ✔✔atrial: 60-100
vent: less than 40
junct: greater than 40
✔✔Third degree AV block (complete heart block) rhythm - ✔✔atrial and vent rhythms
are independent, usually regular but dissociated
✔✔Third degree AV block (complete heart block) p wave - ✔✔normal but not related to
QRS. More P waves than QRS complexes
✔✔Third degree AV block (complete heart block) PR interval - ✔✔no pr interval due to
dissociation
✔✔Third degree AV block (complete heart block) QRS complex - ✔✔depends on level
of escape rhythm
✔✔Pulseless Electrical Activity (PEA) - ✔✔Depends on the rhythm for all categories. A
rhythm is present but NO PLUSE.
✔✔Asystole (ventricular standstill) - ✔✔none in all four categories. No electrical activity
present.
✔✔ST Segment (elevated/depressed) - ✔✔A normal ST segment is usually flat or
isoelectric. It is measured from the end of the QRS to the beginning of the T wave. A
change in the ST segment (whether depressed or elevated) is generally caused by
myocardial ischemic conditions.
✔✔Artifact - ✔✔Bizarre chaotic waveforms. May be by shivering, hiccups or other
movement instead of motions. Check electrodes. Monitor gain up.
✔✔Paced Rhythms - ✔✔There are different types of pacemakers depending on what
the chamber being paced. Spikes should appear before p wave if atrial, before the QRS
if ventricle or before both if both are paced. a Bi-ventricular pacemaker paces both
ventricles and is for heart failure and will have a biphasic spike. Pacemakers can also
have different types of settings so it can be pacing asynchronous or on demand.
✔✔Failure to Sense - ✔✔Sense is the ability of pacemaker to recognize and respond to
cardiac activity. Under sensing occurs when pacer fails to recognize intrinsic activity
