EKG Interpretation Ch. 2

Vectors, Actual EKG, & EKG Tools

In EKG, zero millivolts are called the _________, and you’ll see deflections above and below that line.

Isoelectric line

Electrodes are attached to _____, which are ways to see the activity based on electrical differences picked up on different electrodes.

Leads

The ____ leads help to put the whole EKG reading process into a 3D sphere.

V

The standard is a ____-lead EKG.

12

The aVR, aVl, and aVF are called ______ leads.

Augmented

____ points to the right at 30 degrees above the horizontal.

aVR

_____ points to the left at 30 degrees above the horizontal.

aVL

_____ points straight down towards the foot.

aVF

V1-V3 of the “V” leads tell you what’s happening in the _____/_____ of the heart.

Front/Anterior

V4-V6 of the “V” leads tell you what’s happening on the ____ side of the heart.

Left Lateral

The virtual leads (aVF, aVR, and aVL) are based on a common virtual electrode called Wilson’s Central Terminal or the _______.

They represent the _____ of the existing electrodes known (RA, LL, LA)

Vw Electrode

Averages

Specialized leads, like right sided leads, can be used to look at anything wrong with the _______.

Right Ventricle

_____ help measure the difference in electrical potential between two arbitrary points on the body.

Electrodes

The gel on electrodes contains _____ or _____ helping to conduct electrons.

Silver or Silver Chloride

Leads are nothing but _____ between the points of the ____ placed.

Comparisons

Electrodes

For women (people with breasts) electrodes should be placed ______.

Below them not on top

The _______ is what you’d get if you averaged all the directions of the different vectors. Meaning the direction in which most of the electrical activity in the heart is headed.

Heart Axis

The heart axis is based solely on the ______ leads not the V or precordial leads.

Limb