2025/2026 ACCURATE QUESTIONS AND
VERIFIED CORRECT SOLUTIONS WITH
RATIONALES || 100% GUARANTEED PASS
<RECENT VERSION>
1. Pace rate: SA Node - ANSWER ✓ 60-100
2. Pace rate: AV node - ANSWER ✓ 40-60
3. Pace rate: ventricles - ANSWER ✓ 20-40
4. Electrical Conduction - ANSWER ✓ SA node, AV node, Bundle of His,
Purkinje fibers
5. Normal PR interval - ANSWER ✓ 0.12-0.20 seconds
6. Normal QRS duration - ANSWER ✓ 0.04-0.12 seconds
7. Tele strip: large box - ANSWER ✓ .2 seconds
8. Tele strip: small box - ANSWER ✓ .04 seconds
9. P wave represents - ANSWER ✓ atrial depolarization (contraction)
10.QRS complex - ANSWER ✓ ventricular depolarization
11.QRS complex - ANSWER ✓ atrial repolarization
12.T wave represents - ANSWER ✓ ventricular repolarization
,13.QT interval - ANSWER ✓ starts at the beginning of the Q wave and ends at
the end of the T wave
14.QT interval prolongation - ANSWER ✓ Ventricular tachycardia
15.ST interval - ANSWER ✓ Elevation/depression 2 mm above/below baseline
16.ST elevation - ANSWER ✓ injury (permanent)
17.ST depression - ANSWER ✓ myocardial ischemia
18.A Fib - ANSWER ✓ Quivering of atrium
Irregularly irregular rhythm
No definitive P waves
19.V fib - ANSWER ✓ completely erratic rhythm with no identifiable waves;
fatal
Ventricular quivering
20.Sinus brady - ANSWER ✓ less then 60
O2, atropine, pacemaker, IVF
21.Sinus tach - ANSWER ✓ >100 bpm
22.Vtach strip - ANSWER ✓ -Tombstones
- 3 PVCs in a row
23.A flutter - ANSWER ✓ saw tooth pattern
24.SVT rate - ANSWER ✓ 150-250 bpm (200-250 on test)
25.Bundle Branch block - ANSWER ✓ qrs complex longer that .12 s
Rate >60
26.Action potential - ANSWER ✓ The graphic representation of cellular
electrical events
, Describes the changes in intracardiac voltage that lead to impulse formation
and conduction and, ultimately, to cardiac contraction
27.Automaticity - ANSWER ✓ The ability to initiate impulses spontaneously
28.Conductivity - ANSWER ✓ The ability to conduct an impulse along the cell
membrane
29.Contractility - ANSWER ✓ The ability to contract in response to a stimulus
30.Depolarization - ANSWER ✓ A change in the resting electrical state of the
cardiac cell
The inside of the cell becomes more positive and impulse is spread through
the heart
31.Excitability - ANSWER ✓ The ability of cells to respond to a stimulus
32.Refractory period - ANSWER ✓ Absolute
Relative
33.Absolute refractory period - ANSWER ✓ The cardiac cell is unable to
accept or respond to a stimulus
34.Relative refractory period - ANSWER ✓ A stronger than normal impulse
may stimulate the cardiac cell to depolarize
35.Repolarization - ANSWER ✓ Return of the cardiac cell to the resting
membrane state
The inside of the cell becomes more negative
36.Resting membrane potential - ANSWER ✓ The electrical charge across the
cardiac cell membrane between impulses
About -70 mV
37.Threshold - ANSWER ✓ The electrical level at which the cell will continue
to depolarize without additional stimulus
About -60 mV