EKG Artifacts and Heart Rhythms

The difference between electrocardiography and an electrocardiogram is:

• Electrocardiography is the process of recording the electrical activity of the heart, while an electrocardiogram is the actual recording.

• Electrocardiography is a type of heart disease, while an electrocardiogram is a treatment for it.

• Electrocardiography is a medication for heart conditions, while an electrocardiogram is a surgical procedure.

• Electrocardiography and electrocardiogram are two names for the same procedure.

How much time does each small box and large box represent on an EKG grid?

• A) 0.04 seconds for small box, 0.2 seconds for large box

• B) 0.1 seconds for small box, 0.5 seconds for large box

• C) 0.02 seconds for small box, 0.1 seconds for large box

• D) 0.05 seconds for small box, 0.25 seconds for large box

The standard speed setting for an EKG machine is important because it ensures accurate readings. What is this standard speed setting?

• 25 mm/s

• 50 mm/s

• 75 mm/s

• 100 mm/s

The calibration mark on an EKG machine represents:

• the speed of the paper

• the voltage of the signal

• the time interval between heartbeats

• the amplitude of the signal

Einthoven’s Triangle is important in EKG interpretation because it helps in:

• measuring blood pressure

• determining heart rate

• locating the heart's electrical axis

• assessing lung function

You can determine if a heart rhythm is regular, irregular, or regularly irregular by:

• Checking the intervals between heartbeats

• Measuring blood pressure

• Listening to heart sounds

• Observing the patient's breathing pattern

A medical assistant is calibrating an EKG machine. Which of the following should the assistant identify as the standard speed of the recording?

• 25 mm/second

• 50 mm/second

• 10 mm/second

• 5 mm/second

A medical assistant is preparing a patient for an EKG. Which of the following instructions should the medical assistant provide?

• "Avoid food or drink for 4 hours prior to the test"

• "Remove all clothing from the waist up"

• "Apply moisturizing lotion to the electrode placement sites"

• "Maintain a full bladder for the duration of the test"