Basic EKG Tracing Flashcards

1
Q

What is the first deflection prior to the QRS complex. It represents depolarization of the right and left atrium

A

P wave

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2
Q

the ____ interval is the time between the start of the P wave and the start of the QRS complex. Normal PR interval is between ____ seconds

A

PR Interval
0.12-0.2 seconds

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3
Q

What is the name for the combination of three of the graphical deflections seen on a typical EKG that represents depolarization of the ventricles?
It is usually the central and most visually obvious part of the EKG.

A

QRS complex

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4
Q

_____ follows the QRS complex. It represents the repolarization of the ventricles.

A

T wave

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5
Q

____ starts at the QRS complex and ends at the end of the Twave.

A

QT interval

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6
Q

Normal QRS duration is less than how many seconds?

A

.12 seconds

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7
Q

What represents the time of ventricular activity including both depolarization and repolarization?

A

QT interval

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8
Q

Normal QT interval is how many seconds?

A

0.36-0.44 seconds

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9
Q

What is the segment between the end of the QRS complex and the start of the T-wave.

A

ST segment

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10
Q

True/ False
ST segment should be at the same level on the EKG tracing as the PR interval.

A

True

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11
Q

If the ST segment dips does not come back to the same level as the PR interval line it is termed what? What does this represent?

A

ST depression
Represents the start of myocardial ischemia

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12
Q

What is it called if the ST segment elevates and stays elevated above the PR interval line? what does this represent?

A

ST Elevation
represents full thickness myocardial infarction

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13
Q

Normally T waves are upright except in what lead?

A

V1

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14
Q

If T waves are turned upside down and resemble a U this is termed what? and what does this represent?

A

T-Wave inversion
This could represent ischemia and should be of concern.

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15
Q

Leads I, aVL, V5-V6 represents what?

A

the lateral aspect of the heart and receives blood from the LCx

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16
Q

Leads II, III, aVF represents what?

A

the inferior aspect of the heart and receives blood from the RCA.

17
Q

Leads V1-V2 represents What

A

The septal area of the heart and receives blood from the Left Anterior Descending Artery (LAD)

18
Q

Leads V3-4 represents what?

A

represents the anterior area of the heart (in particular the LV) and receives blood from the LAD.

19
Q

What is Identified by having a wide QRS complex (greater than 0.12 seconds) along with a broad S wave in lead V1 and wide R wave in lead V5 or V6.

A

Left Bundle Branch Block