CMAC EKG Exam Questions and
Answers (Latest Update 2026)
How many electrodes does a 12-lead EKG use? -
correct answer ✅10
What is the difference between an echocardiogram and an
electrocardiogram? -
correct answer ✅The electrocardiogram is used to record
electrical impulses to read the heart's rhythm and the
echocardiogram is used to produce ultrasound images of the heart.
Which of the following is the part of the ECG wave that represents
ventricular contraction? -
correct answer ✅QRS complex
Placement at the fourth intercostal space to the left of the sternum
is known as which of the following? -
correct answer ✅V2
Atrial depolarization is represented by which of the following? -
correct answer ✅ST segment
, CMAC EKG Exam Questions and
Answers (Latest Update 2026)
Each large block of five small squares represents how many seconds
on ECG paper. -
correct answer ✅0.2 seconds
Which of the following waves can be found on an
electrocardiogram tracing? -
correct answer ✅P
Which of the following medical conditions is an EKG meant to
diagnose? -
correct answer ✅Heartbeat irregularity
Ventricular depolarization is represented by which of the following?
-
correct answer ✅QRS complex
What percentage of recorded EKGs are performed with incorrect
placement of the leads? -
correct answer ✅4 percent
Answers (Latest Update 2026)
How many electrodes does a 12-lead EKG use? -
correct answer ✅10
What is the difference between an echocardiogram and an
electrocardiogram? -
correct answer ✅The electrocardiogram is used to record
electrical impulses to read the heart's rhythm and the
echocardiogram is used to produce ultrasound images of the heart.
Which of the following is the part of the ECG wave that represents
ventricular contraction? -
correct answer ✅QRS complex
Placement at the fourth intercostal space to the left of the sternum
is known as which of the following? -
correct answer ✅V2
Atrial depolarization is represented by which of the following? -
correct answer ✅ST segment
, CMAC EKG Exam Questions and
Answers (Latest Update 2026)
Each large block of five small squares represents how many seconds
on ECG paper. -
correct answer ✅0.2 seconds
Which of the following waves can be found on an
electrocardiogram tracing? -
correct answer ✅P
Which of the following medical conditions is an EKG meant to
diagnose? -
correct answer ✅Heartbeat irregularity
Ventricular depolarization is represented by which of the following?
-
correct answer ✅QRS complex
What percentage of recorded EKGs are performed with incorrect
placement of the leads? -
correct answer ✅4 percent
