Table of Contents
What is Lead II ECG?
They are summarized as follows: Lead I: Right arm-negative, Left arm-positive. Records electrical differences between the left and right arm electrodes. Lead II: Right arm-negative, Left leg-positive. Records electrical difference between the left leg and right arm electrodes.
Why is lead II used in ECG?
To assess the cardiac rhythm accurately, a prolonged recording from one lead is used to provide a rhythm strip. Lead II, which usually gives a good view of the P wave, is most commonly used to record the rhythm strip.
Which lead is positive in lead II?
In the lead II configuration, the positive electrode is on the left leg and the negative electrode is on the right arm. Lead III has the positive electrode on the left leg and the negative electrode on the left arm.
What is the correct placement of ECG lead V2?
Precordial Lead Placement V1 is placed to the right of the sternal border, and V2 is placed at the left of the sternal border. Next, V4 should be placed before V3. V4 should be placed in the fifth intercostal space in the midclavicular line (as if drawing a line downwards from the centre of the patient’s clavicle).
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 |
Which leads are chest leads?
The chest (precordial) leads (V1, V2, V3, V4, V5 and V6) have the exploring electrodes located anteriorly on the chest wall and the reference point located inside the chest. Hence, the chest leads are excellent for detecting vectors traveling in the horizontal plane.
Where are leads I II and III placed?
Leads I, II, III, aVF, aVL and aVR are all derived using three electrodes, which are placed on the right arm, the left arm and the left leg. Given the electrode placements, in relation to the heart, these leads primarily detect electrical activity in the frontal plane.
What is a 3 lead ECG?
3-electrode system Uses 3 electrodes (RA, LA and LL) Monitor displays the bipolar leads (I, II and III) To get best results – Place electrodes on the chest wall equidistant from the heart (rather than the specific limbs)