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Module #13: EKG and Cardiovascular Testing
Terms in this set (40)
How many identifiers are required to correctly identify a patient's EHR?
What two identifiers might you use to verify a patient's identity?
name and date of birth
How would you identify a patient who is unable to communicate, dementia, or another condition that affects mental functioning?
family member or care giver
What is an electrocardiogram?
test that records activity of the electrical system within the heart
What should the medical assistant do prior to starting the procedure?
ask the patient if there are any questions
When disrobing, the patient should have accessible what areas of the body?
chest, lower legs, or ankles
A drape or gown should be applied how?
opening in the front
What needs to be removed from the patient that could interfere with lead placement or touch the lead wires during the procedure?
jewelry (bracelets, necklaces)
What should be turned off and removed from the patient that could lead to artifacts on the EKG tracing?
all electronic devices such as cell phones
What is an artifact?
unwanted external event occuring in an EKG tracing not associated with the heart function
How many leads does a multichannel EKG monitor record?
12 leads at once
How many leads does a three-channel EKG unit record?
3 leads at once
How many leads does a single-channel EKG unit record?
1 lead at a time
What is telemetry?
computer-based monitoring, typically conducted in a hospital setting, which patients are constantly monitored for any irregularities
How many electrodes are applied to patient for a 12-lead EKG?
What does an electrode contain?
electrolyte gel that serves as a conductor of the impulses
Electrocardiograph paper can be displayed in what type of format?
graph or dot matrix format
What does the vertical axis represent?
gain or amplitude
What does the horizontal axis represent?
What does each small vertical square represent?
What does each small horizontal square represent?
What is the normal paper speed?
What is the normal amplitude?
10 mm or 1 mv
Medical assistant has to be careful with the EKG graph paper for what reason?
EKG paper is heat- and pressure-sensitive
What should the patient be instructed to avoid applying before an EKG test?
substances to the skin such as lotions, powders, oils, or ointments
How should an assistant ensure skin is clean?
by using alcohol wipes, electrolyte pads or soap and water to prep the site
If patient has excessive hair and assistant cannot properly place the electrodes with normal skin prep what is the assistant's next step?
Where should limb electrodes be placed?
fleshy areas of the skin and within the same general vicinity on each limb
Where do the first six recorded leads originate from?
arms and legs
Which are the bipolar leads?
Leads I, II, and III
Which leads record impulses that travel from a negative to positive pole at specific positions in the heart?
Leads I, II, and III
What lead records impulses between the left and right arms?
What lead records impulses between the right arm and left leg?
What lead records impulses between the left arm and left leg?
Which are unipolar leads?
aVR, aVL, aVF
What is amplitude?
also known as gain is the degree of change; in an EKG tracing, it is represented by the vertical axis
What is bipolar?
recording of electrical current involving both a positive and negative pole
What is unipolar?
recording from one location or one pole
What is augmented?
a unipolar recording that requires assisting in magnifying the tracing by drawing from other poles
What is precordial?
located on the chest in front of the heart
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