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12-Lead ECG Interpretation
Interpreting 12 leads
61
Health Care
Professional
07/27/2010

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Cards

Term
Leads I, II, and III
Definition
List the bi-polar leads.
Term
An upright complex
Definition
Flow of depolarization from negative to positive causes what on an ECG?
Term
Leads I, V5, V6
Definition
What are the lateral leads?
Term
V1, V2, V3, V4
Definition
What are the anterior leads?
Term
From Right Arm (-) to Left Arm (+)
Definition
What does lead I view?
Term
From Right Arm (-) to Left Foot (+)
Definition
What does lead II view?
Term
From Left Arm (-) to Left Foot (+)
Definition
What does lead III view?
Term
Lead aVR: RA (+) to [LA & LF] (-) (Rightward)

Lead aVL: LA (+) to [RA & LF] (-) (Leftward)

Lead aVF: LF (+) to [RA & LA] (-) (Inferior)
Definition
What are the augmented unipolar limb leads?
Term
Leads V1, V2, V3: (Posterior Anterior)

Leads V4, V5, V6:(Right Left, or lateral)
Definition
What are the unipolar (+) chest leads (horizontal plane):
Term
Normal
Definition
State the type of deviation:
Lead I up, AVF up
Term
Extreme deviation
Definition
State the type of deviation:
Lead I down, AVF down
Term
Left axis deviation
Definition
State the type of deviation:
Lead I up, AVF down
Term
Right axis deviation
Definition
State the type of deviation:
Lead I down, AVF up
Term
The end of T-wave to the beginning of the next P-wave
Definition
What is used to determine the isoelectric line on the ECG?
Term
Find J-point, move over one box, and count how elevated the segment is.
Definition
How do you find the amount of elevation of the ST segment?
Term
Tall P-waves
Definition
What is indicative of Right Atrial Enlargement?
Term
Determine the underlying rhythm.
Definition
what should you do in all leads?
Term
Determine the underlying rhythm.
Definition
what should you do in all leads?
Term
70%
Definition
What percentage of blood "plops" into the ventricle during diastole?
Term
30%
Definition
What percentage of blood stays in the atria during diastole?
Term
Plop-Kick-Squirt
Definition
What are the 3 stages of contraction?
Term
When they have chronic lung disease, and often before the actual lung disease kills them.
Definition
When do people die of right-sided heart failure?
Term
In the P-waves of the ECG
Definition
When the right side of the atria enlarges, where will you see changes?
Term
Respiratory system
Definition
What system causes Tall P-waves?
Term
The right half of the hump will be elongated and the left side will be a shallow dip
Definition
How can you tel Right-Atrial enlargement in V1/
Term
2nd intercostal space nesxt to sternum
Definition
Pulmonic vlave listening point
Term
Stenosis is hardening of the valve
Definition
What is Stenosis?
Term
Not closing completely
Definition
What is valve insufficiency?
Term
Chronic hypertension
Definition
What is the #1 cause of left atrial enlargement?
Term
More than 2 little squares.
Definition
what is too wide for a P-wave?
Term
Junctional Rhythm
Definition
What is NO P wave, a QRS and a T wave?
Term
First degree heart block
Definition
What is an elongated PR interval followed by the QRS?
Term
25 small boxes
Definition
The QRS should never be taller than what?
Term
QRS taller than 25 small boxes in V6
Definition
Left ventricular hypertrophy...
Term
Really deep S
Definition
Really wide QRS in V6 should show what in V1?
Term
Ischemia
Definition
You will usually not have elevated ST segments during what?
Term
Pericarditis
Definition
PR depression =
Term
Left Bundle Branch Block; Left Ventricular Hypertrophy
Definition
What is the most common cause of ST segment elevation in V1, V2, and
Term
The V leads
Definition
Which leads have to be precisely placed?
Term
Depression that comes right back up
Definition
Non cardiac ST depression...
Term
ST segment depression that stays level
Definition
Ischemia
Term
ST segment depression that dips further
Definition
More ischemic depression shows how?
Term
Low potassium
Definition
What can cause a flipped T wave?
Term
low pottassium
Definition
Hypokalemia
Term
Heart straining to repolarize
Definition
T wave long coming down and rapidly going back up is what?
Term
A strain pattern in the depressed T wave
Definition
What will severe hypertrophy cause?
Term
No... but you will if you have a huge heart that struggles to depolarize and repolarize.
Definition
Do all Bundle Branch Blocks show a strain pattern?
Term
9-11 small boxes
Definition
How long should the Q-T interval be?
Term
Amioderone
Definition
What is a common antiarrhythmic agent given, which prolongs the Q-T interval?
Term
a prolonged QT interval
Definition
What always precipitates Torsades?
Term
Torsades
Definition
If the QT is greater than 11 small boxes, what is your pt at risk of going into?
Term
There are delays in cardioverting due to the morphed R's
Definition
Why is Torsades the only rhythm you do not cardiovert?
Term
Thickened muscle
Definition
What will pull the electrical vectors?
Term
Extreme axis
Definition
What shows v-Tach but not abberancy
Term
It rejects it.
Definition
What does dead muscle do to the electrical impulse?
Term
Right axis deviation
Definition
What type of deviation with lateral wall MI/
Term
Left
Definition
What type of deviation with an inferior MI?
Term
Necrotic (dead) tissue
Definition
WHat does your axis run away from?
Term
Cardiac disease may have changed the vector to give appearance of asystole in Lead II, because the perpendicular lead to the vector is shows small and biphasic.
Definition
Why do you check asystole in another lead?
Term
left atrial enlargement
Definition
Wide P-waves =
Term
A deep S in V6
Definition
A wide QRS in V1 should show what?
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