What is Lead II in ECG?
ECG Leads I, II and III (Willem Einthoven’s original leads) Lead II compares the left leg with the right arm, with the leg electrode being the exploring electrode. Therefore, lead II observes the heart from an angle of 60°.
What color is lead 2 on ECG?
Color coding of the ECG leads
| Location | Inscription | Colour |
|---|---|---|
| Right Leg | RL | Green |
| Left Leg | LL | Red |
| Chest | V1 | Brown/Red |
| Chest | V2 | Brown/Yellow |
Is Lead 2 positive or negative?
Leads II, III and aVF are leads that have their positive electrode located at the left foot. They are contiguous leads that all look at the inferior wall of the left ventricle. Leads I and aVL are leads that have their positive electrode located on the left arm.
Why is lead II the most common?
(3) Lead II is used more frequently because most of the heart’s electrical current flows toward its positive axis. This lead gives the best view of the ECG waves and best shows the heart’s conduction system’s activity.
Where is the positive electrode in lead 2?
In the lead II configuration, the positive electrode is on the left leg and the negative electrode is on the right arm.
How do you read an ECG diagram?
How to Interpret an ECG in Seven Steps
- Step 1: Heart Rate.
- Step 2: Heart Rhythm.
- Step 3: Electrical Heart Axis.
- Step 4: The PR Interval.
- Step 5: The QRS Complex.
- Step 6: Repolarization.
- Step 7: The R/S Ratio.
- How to Interpret an ECG: An Overview.
Which lead is read in ECG?
Nurses are usually the first ones to read that “hot off the press” EKG tracing. A 12-lead EKG is considered the gold standard; however, a 4 lead EKG can also diagnose different heart conditions….Leads and Heart View.
| Lead | View |
|---|---|
| Lateral | I, AVL, V5, V6 |
| Anterior | V2, V3, V4 |
| Right atrium and cavity of left ventricle | V1 and AVR |
How is the Hexaxial diagram used?
The hexaxial reference system is diagram based on the first six leads of the 12 lead ECG. It is used to help determine the heart’s electrical axis in the frontal plane.
Which ECG lead is most important?
Right sided ECG electrode placement
- The most useful lead is V4R, which is obtained by placing the V4 electrode in the 5th right intercostal space in the mid-clavicular line.
- ST elevation in V4R has a sensitivity of 88%, specificity of 78% and diagnostic accuracy of 83% in the diagnosis of RV MI. [ see Inferior STEMI]