EKG: Abnormal Interpretations Flashcards

1
Q

The P Wave is associated with the activation of what area of the heart?

A

Activation of the Atria

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2
Q

The QRS Complex is associated with the activation of what area of the heart?

A

Activation of the Ventricles?

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3
Q

The T Wave is associated with the activation of what wave of the heart beat?

A

The Recovery Wave

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4
Q

How much time is equivalent to one square on an ECG readout?

A

1 square = 0.04 sec (40 m/s)

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5
Q

What is a normal HR for an ECG analysis?

A

60-100 bpm.

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6
Q

What is a normal PR Interval for an ECG analysis?

A

0.12 - 0.20 sec (about small 3 boxes)

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7
Q

What is a normal QRS Interval for an ECG analysis?

A

< 0.12 sec

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8
Q

How do you calculate rate on an ECG?

A

Count the number of large boxes between consecutive R waves and divide 300 by this number.

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9
Q

What is Paroxysmal Supraventricular Tachycardias (PSVT)?

A

Sudden run of >3 premature beats (both sustained for up to hours or longer + brief & non-sustained: 3 beats up to 30 sec)

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10
Q

What are some characteristics of Atrial Flutter’s?

A

Atrial rate is constant, Ventricular rate depends on AV junction, Variable Rhythm (regular or irregular), and No Observable P Waves.

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11
Q

In Atrial Fibrillations Atrial Rates are _____ and Ventricular Rates are ______ ?

A

Atrial: Chaotic | Ventricular: Irregular

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12
Q

How would you describe the Rhythm of Atrial Fibrillation?

A

Irregular, with no specific pattern. No stable relationship between fibrillary atrial waves and the QRS complex’s.

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13
Q

How would you describe the P waves of Atrial Fibrillation?

A

No identifiable P waves, only fibrillary (f) waves, irregular movements of baseline.

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14
Q

Is the PR Interval measurable in Atrial Fibrillation?

A

Not measurable.

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15
Q

What triggers an Atrial Fibrillation?

A

Rapid electrical activity starting in the pulmonary vein and spreading to the atrium.

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16
Q

What is AV (Atrio-Ventricular) heart block?

A

Conduction disturbances, impaired transmission from atria to ventricles. (AV node dysfunction)

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17
Q

What is the primary measure of AV Heart Blocks?

A

PR Interval

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18
Q

How many types of AV Heart Block are there?

A

1st Degree, 2nd Degree (Type 1 & Type 2), and 3rd Degree

19
Q

How would you describe 1st Degree AV Heart Block?

A

Mildest, more of a delay & not a block. Impulses moving through the AV node too slowly.

20
Q

What is the PR Interval of 1st Degree AV Heart Block?

A

> 0.20 sec

21
Q

What are some causes of 1st Degree AV Heart Block?

A

Medication-Induced, Myocardial Infarction, and Hyperkalemia.

22
Q

How would you characterize 2nd Degree Heart Block Mobitz Type I?

A

Progressive lengthening of PR interval w/non-conducted P wave. (usually only 2-3 P waves occur before a QRS is dropped)

23
Q

What are some causes of 2nd Degree Heart Block Type 1?

A

Medication-Induced, Ischemic Heart Disease, Acute Inferior Wall Infarction, and Enhanced Vagal tone (Athletes)

24
Q

How would you describe the Rhythm of 2nd Degree Heart Block Type 2?

A

Irregular with “grouped” beats.

25
Q

How would you describe the Rate of 2nd Degree Heart Block Type 2?

A

Atrial: Constant between 60-100 bpm. Ventricular: Varies due to non-conducted P wave.

26
Q

How would you describe the P wave & PR Interval of 2nd Degree Heart Block Type 2?

A

P Wave: sudden appearance of a non-conducted P wave

PR Interval: NO progressive lengthening.

27
Q

What is 2nd Degree Heart Block Type 2 a general sign of & what is the treatment?

A

General sign of severe conduction system disease (AV node & below)

Treatment: Pacemaker

28
Q

How would you describe 3rd Degree Heart Block?

A

PR Interval is irregular & not related to the flow of electrical stimuli.

29
Q

How is the pacemaker rhythm recognized?

A

Easily recognized through pacemaker spikes (vertical signals that represent the electrical activity of the pacemaker)

30
Q

How do Premature Ventricular Contractions occur?

A

Randomly or may alternate with normal beats in a regular pattern.

31
Q

What are some EKG rhythm properties associated with PVC’s?

A

P Wave: not conducted
PR Interval: not measurable
QRS Complex: > 0.12 secs with abnormal form
Rhythm: irregular
Rate: variable

32
Q

A Triplet PVC is what shape?

A

Non-Sustained VTach

33
Q

A Multifocal PVC is what shape?

A

More than one shape

34
Q

What is Ventricular Tachycardia (V-Tach)?

A

Fast heart rhythm that originates in one of the ventricles.

35
Q

A Ventricular Tachycardia has a run of ___ QRX complex’s?

A

> 3 (single, non-sustained, or sustained for > 30 sec)

36
Q

What are some EKG rhythm properties associated with V-TACH?

A

Rate: Ventricular rate is 150-200 bpm
Rhythm: Regular or Slightly Irregular
P Wave: Usually not distinguishable
PR Interval: Not Measurable
QRX Complex: Wide & Bizarre (>0.12 secs)

37
Q

What is a Ventricular Fibrillation (V-Fib)?

A

Uncoordinated contraction of the ventricles resulting in a “quivering” rather than a normal contraction.

38
Q

What are some EKG rhythm properties?

A

P Wave: Not Identifiable
PR Interval: Not Measurable
QRS Complex: Not Identifiable
Rhythm: Chaotic, not identifiable
Rate: cannot be determined

39
Q

In V-TACH & V-FIB, if the ventricles are not contracting properly, what is the outcome?

A

Decrease in cardiac output.

40
Q

How is V-FIB identified?

A

Most commonly identified as arrhythmia in cardiac arrest patients.

41
Q

What are Bundle Branch Blocks?

A

Delays in electrical signal conduction to the R & L ventricular tissue

42
Q

How do you determine the presence of BBB?

A

Primarily examine QRS waves

43
Q

How is a R Bundle Branch Block typically spotted? (characteristics)

A

“Bunny Rabbit Ears”

44
Q

How is a L Bundle Branch Block typically identified?

A

Produced an R, R’ in the left chest leads V5/V6 with accompanying broad R-wave and deep S and inverted T-Wave.