Waveforms & Leads
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| waveforms created by | Dr. Einthoven credited for the first three leads Einthoven's triangle
🗑
|
||||
| letters of waveforms | P Q R S T U
🗑
|
||||
| isoelectric line | baseline - has no polarity - invisible
🗑
|
||||
| above the isoelectric line | is positive
🗑
|
||||
| below the isoelectric line | is negative
🗑
|
||||
| Pwave | first wave mark-atrial depolarization- starts at SAnode to internodol pathways to AVnode
🗑
|
||||
| TAwave | atrial repolarization NOT SEEN ON EKG
🗑
|
||||
| QRS Complex | ventricular depolarization- starts after the Pwave can start + or - ends at the isoeletric line/ is one of the largest wave line.
🗑
|
||||
| Jpoint | is where the QRS ends at the isoelectric line and ST segment begins
🗑
|
||||
| STwave | ventricle depolarization begins at Jpoint ends at Twave sodium is exiting and potassium is entering
🗑
|
||||
| ST segment | ending depolarization going towards repolarzation starts after Jpoint
in normal EKG run w/ isoelectric line
🗑
|
||||
| Twave | total ventricular repolarazation potassium inside and sodium outside
🗑
|
||||
| ST + Twave elevation + | acute lack of oxygen to the myocardium
🗑
|
||||
| ST + Twave depressed - | Ischemia shows signs of heart damage
🗑
|
||||
| Ischemia | heart damage
🗑
|
||||
| Uwave | Hypokalemia low patassium
🗑
|
||||
| waveforms | movement away from the isoelecric line they can be + or -
🗑
|
||||
| intervals | is a waveform + a segment
PR interval & QT interval
🗑
|
||||
| segments | isoelectric event between wave forms
ST segment
🗑
|
||||
| complex | several waveforms
QRS complex
🗑
|
||||
| PR segment | AV delay
🗑
|
||||
| PR interval | from the start of the Pwave to the beginning of the QRS complex
starts at SAnode to internodal pathways to AVnode
🗑
|
||||
| Rwave | Positive waveform any positive wave in the QRS is Rwave
🗑
|
||||
| Qwave | negative waveform BEFORE the Rwave shows damage to the heart
🗑
|
||||
| Swave | negative waveform AFTER the Rwave
🗑
|
||||
| R prime R1 | is a second Rwave
🗑
|
||||
| S prime S1 | is a second Swave
🗑
|
||||
| QT interval | ventricular depolarization ventricular repolarization begins at the beginning of the QRS ends at the end of the Twave
🗑
|
||||
| 1 small box time is | .04 seconds
🗑
|
||||
| 1 vertical box is | voltage = 1 milmeter of voltage
🗑
|
||||
| 5 small boxes in time | = .20 seconds
🗑
|
||||
| 5 large boxes in time | = 1 second
🗑
|
||||
| 15 large boxes in time | = 3 seconds
🗑
|
||||
| 30 large boxes in time | = 6 seconds
🗑
|
||||
| rhythm | can be regular or irregular
🗑
|
||||
| irregular heart rate rule | in 6 seconds how many QRS complexes X 10 = heart rate
🗑
|
||||
| regular heart rate rule | 300, 150, 100, 75, 60, 50, 43 BPM
🗑
|
||||
| leads I, II & III also known as | Einthoven's Triangle
🗑
|
||||
| how many leads on EKG | 12 leads
🗑
|
||||
| lead I | -R arm to +L arm bipolar is always going to have a positive QRS always on Rwave
🗑
|
||||
| lead II | -R arm to +L leg bipolar right leg always ground green common for arrhythmia it has the most prominent Pwave
🗑
|
||||
| lead III | -L arm to +L leg bipolar NOT use for arrhythmias placed on
🗑
|
||||
| augmented leads | +AVR=R arm +AVL=L arm +AVF=L leg augmented voltage unipolar & positive. looking from the inside out. enlarged on the EKG not used for arrhythmias
🗑
|
||||
| lead V1 | 4th intercostal space right side of sternum percordial unipolar positive
🗑
|
||||
| Percordial leads | V1,V2, V3, V4,V5 & V6 need to be put in the right spot EVERY SINGLE TIME! never on a bone are unipolar and positive.NOT ON BONE
🗑
|
||||
| lead V2 | 4th intercostal space on left side of sternum pericordial unipolar positive
🗑
|
||||
| lead V4 | 5th intercostal space at the mid clavicular line percordial unipolar positive
🗑
|
||||
| lead V3 | between V2-V4 in the 5th intercostal space percordial unipolar positive
🗑
|
||||
| lead V6 | midaxillary line in line with V4 on side percordial unipolar positive
🗑
|
||||
| lead V5 | 5th intercostal space between V4-V6 percordial unipolar postive
🗑
|
||||
| normal sinus rhythm NSR regular sinus rhythm RSR | rhythm regular 60-100 bpm PR interval .12-.20 QRS complex .04-.11
🗑
|
||||
| sinus tachycardia | rhythm regular 100-150 bpm PR interval .12-.20 QRS complex .04-.11
🗑
|
||||
| sinus bradycardia | rhythm regular 60-40 bpm PR interval .12-.20 QRS complex .04-.11
🗑
|
||||
| sinus arrhythmia | rhythm slightly irregular 60-100bpm PR interval .12-.20 QRS complex.04-.11
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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
Normal Size Small Size show me how
Created by:
joanneb
Popular Medical sets