Lecture 17: Normal ECG Flashcards

1
Q

Where is P wave always inverted?

A

aVR

-since atria is depolarized right to left

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2
Q

If the PR interval is not between 0.12-0.2 seconds, what can that be indicative of?

A

First AV nodal block

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3
Q

If QRS complex is longer than 0.12 seconds, what can that be indicative of?

A

Bundle Branch Block

Hypertrophy

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4
Q

If ST segment is depressed more than 0.5 mm, what can that mean?

A

Subendocardial injury

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5
Q

If ST segment is elevated more than 0.5 mm, what can that mean?

A

Subepicardial injury

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6
Q

What can abnormal QT intervals be associated with?

A

Myocardial ischemia, injury, or infarction

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7
Q

What can an abnormal T wave be associated with?

A

Hyperkalemia

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8
Q

If lead 1 and aVF are both positive, what is the axis?

A

Normal: 0-90 deg

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9
Q

If lead 1 is negative and aVF is positive, what is the axis?

A

RAD: greater than 90 deg

-right axis deviation

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10
Q

If lead 1 is positive and aVF is negative, what is the axis?

A

LAD: less than 0 deg

-left axis deviation

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11
Q

What can cause left axis deviation?

A

Pregnancy
Tumor
Blocks
Chronic lung disease

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12
Q

What can cause right axis deviation?

A

COPD

Chronic lung disease

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13
Q

A fat, broad P wave can be indicative of what?

A

Mitral disease

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14
Q

A flat P wave can be indicative of what?

A

P-pulmonale

-lung issue

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15
Q

An inverted P wave can be indicative of what?

A

AV junctional rhythm

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16
Q

What is tachycardia?

A

Heart Rate >100 bpm

17
Q

What is bradycardia?

A

Heart Rate <60 bpm

18
Q

What can no P waves indicate?

A
Atrial fibrillation
Atrial flutter
Junctional or ventricular escape rhythm
Junctional tachycardia
VT