APEX EKG TEST COMPREHENSIVE STUDY GUIDE 2026 FULL QUESTIONS AND SOLUTIONS GRADED A+

APEX EKG TEST COMPREHENSIVE
STUDY GUIDE 2026 FULL QUESTIONS
AND SOLUTIONS GRADED A+

◍ A flutter.
Answer: regular P: wave: absent PR: undet. QRS:regular Rate: atrial: 300
◍ Phase 0 of the cardiac action potential correlates to what event, EKG piece,
and ion movement?.
Answer: DepolarizationQRSNa+ influx
◍ A fib.
Answer: irregular P: wave: absent- fib line PR: n/a QRS: regular Rate: no
atrial rate
◍ Phase 1 of the cardiac action potential correlates to what event, EKG piece,
and ion movement?.
Answer: Initial repolarizationQRSCl- influxK+ efflux
◍ Sinus rhythm with PAC.
Answer: irregular P: wave: present PR: normal but variable QRS: regular
Rate: n/a
◍ Sinus bradycardia.
Answer: regular P: wave: present PR: regular QRS: narrow Rate: <60
◍ Phase 2 of the cardiac action potential correlates to what event, EKG piece,
and ion movement?.
Answer: PlateauST segmentCa+2 influxK+ efflux
◍ Phase 3 of the cardiac action potential correlates to what event, EKG piece,
and ion movement?.
Answer: Final repolarizationT waveK+ efflux

, ◍ NSR.
Answer: regular P: wave: present PR: regular QRS: regular Rate: 60-100
◍ Phase 4 of the cardiac action potential correlates to what event, EKG piece,
and ion movement?.
Answer: Resting phaseEnd of T wave --> next QRSNa+ efflux (Na/K pump
restores RMP)
◍ Sinus Tachycardia.
Answer: regular P: wave: present PR: regular QRS: regular Rate: 100-160
◍ What are the Bipolar leads?.
Answer: I, II, III
◍ What are the limb leads?.
Answer: aVR, aVL, aVF
◍ SVT.
Answer: regular P: wave: absent PR: n/aQRS: regular Rate: high, loves 210
◍ What are the precordial leads?.
Answer: V1, V2, V3, V4, V5, V6
◍ AV Junctional.
Answer: regular P: wave:absent PR: n/aQRS: regular Rate: 50ih
◍ Accelerated Junctional.
Answer: regular P: wave: inverted and small PR: regular QRS:regular Rate:
>50
◍ First degree heart block.
Answer: P wave: present PR: prolonged but consistent QRS: regular Rate:
~60ish
◍ What are the 3 internodal tracts that connect the SA to the AV node?.
Answer: Anterior = Bachmann bundleMiddle = WenckebachPosterior =
Thorel
◍ P waveDuration.