CCI CRAT EXAM NEWEST 2026 ACTUAL EXAM TEST
BANK| CCI CERTIFIED RHYTHM ANALYSIS
TECHNICIAN EXAM PREP WITH 400 REAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A+ (BRAND NEW!!)
1. The sinoatrial (SA) node is located in which chamber of the
heart?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Answer: A
Rationale: The SA node is located in the upper wall of the
right atrium near the opening of the superior vena cava. It is
the primary pacemaker.
1
,2. The normal intrinsic firing rate of the SA node is:
A) 20–40 bpm
B) 40–60 bpm
C) 60–100 bpm
D) 100–150 bpm
Answer: C
Rationale: SA node fires at 60–100 bpm. AV junction 40–
60 bpm; ventricles 20–40 bpm.
3. Which structure is the secondary pacemaker of the heart?
A) Purkinje fibers
B) Atrioventricular (AV) node
C) Bundle of His
D) Left bundle branch
Answer: B
2
, Rationale: The AV node can take over as pacemaker at
40–60 bpm if the SA node fails.
4. The P wave on an ECG represents:
A) Ventricular depolarization
B) Atrial depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: B
Rationale: The P wave reflects electrical activation
(depolarization) of the atria.
5. The QRS complex represents:
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
3
, D) AV nodal delay
Answer: B
Rationale: The QRS reflects rapid ventricular
depolarization.
6. The T wave represents:
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: C
Rationale: The T wave represents ventricular repolarization
(recovery).
7. The normal PR interval duration is:
A) 0.04–0.10 sec
B) 0.12–0.20 sec
4
BANK| CCI CERTIFIED RHYTHM ANALYSIS
TECHNICIAN EXAM PREP WITH 400 REAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A+ (BRAND NEW!!)
1. The sinoatrial (SA) node is located in which chamber of the
heart?
A) Right atrium
B) Left atrium
C) Right ventricle
D) Left ventricle
Answer: A
Rationale: The SA node is located in the upper wall of the
right atrium near the opening of the superior vena cava. It is
the primary pacemaker.
1
,2. The normal intrinsic firing rate of the SA node is:
A) 20–40 bpm
B) 40–60 bpm
C) 60–100 bpm
D) 100–150 bpm
Answer: C
Rationale: SA node fires at 60–100 bpm. AV junction 40–
60 bpm; ventricles 20–40 bpm.
3. Which structure is the secondary pacemaker of the heart?
A) Purkinje fibers
B) Atrioventricular (AV) node
C) Bundle of His
D) Left bundle branch
Answer: B
2
, Rationale: The AV node can take over as pacemaker at
40–60 bpm if the SA node fails.
4. The P wave on an ECG represents:
A) Ventricular depolarization
B) Atrial depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: B
Rationale: The P wave reflects electrical activation
(depolarization) of the atria.
5. The QRS complex represents:
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
3
, D) AV nodal delay
Answer: B
Rationale: The QRS reflects rapid ventricular
depolarization.
6. The T wave represents:
A) Atrial depolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial repolarization
Answer: C
Rationale: The T wave represents ventricular repolarization
(recovery).
7. The normal PR interval duration is:
A) 0.04–0.10 sec
B) 0.12–0.20 sec
4
