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Medical Assistant > Chapter 26 > Flashcards

Chapter 26 Flashcards

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USMLE® Step 1 flashcards
1
Q

This arrhythmia occurs when there is a disruption of the electrical impulse through the heart

A

Heart block

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2
Q

What interval represents atrial depolarization

A

PR wave

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3
Q

What wave represents the repolarization of the ventricles?

A

T wave

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4
Q

Which structure is created from the repolarization of the ventricles

A

T wave

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5
Q

What wave represents atrial depolarization?

A

P wave

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6
Q

What state creates electrical activity that can be picked up on the ECG tracing?

A

Polarized and repolarized state

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7
Q

The PR segment follows the P wave and appears as an isoelectric line ?

A

True

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8
Q

Which recorder is used to monitor the heart over a 24 to 48 hour period while patient goes ok with their activities?

A

Holter monitor

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9
Q

The patients heart rate is 38 beats per minute. What changes should you make before obtaining the tracing?

A

Decrease the chart speed

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10
Q

The valve between the left upper and lower chambers of the heart is ?

A

Bicuspid or mitral valve

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11
Q

Which wave is a large triangular shape?

A

R wave

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12
Q

A specialized intermodal tract that takes the impulse to the left atrium is?

A

Bachmans bundle

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13
Q

Which artifact appears as jagged peaks with irregular height and spacing and thick looking?

A

Somatic

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14
Q

State where cardiac cells are resting?

A

Polarized state

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15
Q

Adult heart is under 60 beats per min and this normal rhythm for a conditioned athlete?

A

Sinus bradycardia

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16
Q

If you turn a baseline filter it will help decrease what type of artifact?

A

Wandering baseline

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17
Q

Another name for bicuspid valve?

A

Mitral valve

18
Q

What is true regarding the ST segment?

A

It is an isoelectric line

19
Q

When there is an artifact on leads I and III the right arm electrode needs to be checked

A

False left arm

20
Q

On an ECG tracing what represents a period time with no electrical activity?

A

An isoelectric line

21
Q

What is a deflection from the baseline?

A

Wave

22
Q

What is it when ventricles quiver uncontrollably the orient has no pulse and is not breathing?

A

Ventricular fibrillation

23
Q

A signal distortion or unwanted erratic movement of the stylus causes by outside interference?

A

Artifact

24
Q

A lead wire breaks what artifact would appear on the tracing?

A

Flatline artifact

25
Q

What ECG wave or segment is a negative deflection and represents intraventricular septal depolarization?

A

Q wave

26
Q

What ECG wave or segment represents ventricular repolarization?

A

T wave

27
Q

The ECG Rhythm strip is evaluated from left to right. The following should be assessed?

A

Rate, rhythm and appearance of the segments waves and intervals

28
Q

Which test stays on patient for 30 days?

A

Cardiac event recorder

29
Q

What does P wave represent?

A

First wave in tracing

30
Q

Phase of heartbeat when the heart is at rest and atrial fills with blood?

A

Diastole

31
Q

Artifact with jagged peaks and spikes?

A

AC interference

32
Q

What is a contractiva phase of a heartbeat?

A

Systole

33
Q

Lead III is created using ?

A

Left arm and left leg

34
Q

Standard leads are also called argumented leads

A

False

35
Q

Standard leads are measured from negative to positive pole?

A

True

36
Q

Artifact can occur If you put electrode on bony area or with breathing movements?

A

Wandering baseline

37
Q

What happens if leas wires are wrapped closely?

A

AC interference

38
Q

Patient heart rate is 100 beats per minute what do you need to change?

A

Increase chart speed

39
Q

What blood vessels that carry oxygen rich blood lungs to heart?

A

Pulmonary vein

40
Q

On an ECG tracing what is made up of many waves?

A

Complex

41
Q

What is another name for interventicular bundle?

A

Bundle of his/ AV bundle

42
Q

Upward movement away from baseline in ECG tracing?

A

Positive deflection

Medical Assistant (5 decks)

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