Save
or

or

taken

why

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

focusNode
Didn't know it?
click below

Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size     Small Size show me how

Phys2 ECG vector

What are the clinical uses of a vector when looking at ECGs? it is an arrow symbolizing the direction of depolarization that can be used for: 1.Change in heart mass (Hypertrophy). 2.Alteration of dipoles (infarction).
Which chamber of the heart contributes the most to the MEAN QRS vector (the sum of all the vectors)? Left ventricle, b/c it has the most mass
what direction is septal depolarization? Left to Right
Where does the tail of the vector always start? Where does the tip of the vector go? Tail: AV node. Tip: intersection of all three leads QRS amplitudes.
What are the two methods for quantitating the direction of the vectors? 1.Triaxial (Only leads I, II, and III). 2.Hexaxial (All 6 vertical leads)
upward and downward QRS from a hexaxial reference: Lead I Upward: Towards 0. Downward: Towards +180
upward and downward QRS from a hexaxial reference: Lead II Upward: Towards +60. Downward: Towards -120.
upward and downward QRS from a hexaxial reference: Lead III Upward: Towards +120. Downward: Towards -60.
upward and downward QRS from a hexaxial reference: aVF Upward: Towards +90. Downward: Towards -90.
upward and downward QRS from a hexaxial reference: aVR Upward: towards -150. Downward: Towards +30
upward and downward QRS from a hexaxial reference: aVL Upward: Towards -30. Downward: Towards +150.
What is the normal range for a mean QRS vector on a hexaxial reference? How would the QRS of Lead I and aVF appear? -10 to +110. (The Lower Left quadrant) **Lead 1: upwards. aVF: upwards.
What number range would be seen with LAD (left axis deviation)? How would the QRS of Lead I and aVF appear? 0 to -90. The Upper left quadrant. **Lead I: upwards. aVF: downward
What number range would be seen with RAD (Right axis deviation)? How would the QRS of Lead I and aVF appear? +90 to +180. The Lower Right quadrant. **Lead I: downward. aVF: upward
What number range would be seen with an Extreme RAD or Northwest? How would the QRS of Lead I and aVF appear? -90 to +180. The upper Right quadrant. **Lead I:downward. aVF: downward
What leads should be analyzed analyzed when looking for abnormal cheat "rotations" V3 & V4. **Right rotation: transitoin leads will be V1 and V2. **Left rotation: transition leads will be V5 and V6 **If they move towards right, rightward rotation. **If they move toward the left, leftward rotation
What Effects will Hypertrophy have on the mean vector? Will cause the vector to move TOWARDS the hypertrophy.
What Effects will Infarction have on the mean vector? Will cause the vector to move AWAY from the infarction b/c the tissue is dead.
When would it be ok to see LAD in a patient? OBESITY
Created by: WeeG

Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

 "Know" box contains: Time elapsed: Retries:
restart all cards