Einthoven
Leads
Leads continued
Calculating
EKG machine
100

What is Lead I

Right arm to left arm

100

Precordial leads are also known as?

Chest leads (v1-v6)

100

What are unipolar leads

V1-V6, electrical charge only goes 1 way

100

What is a normal PR interval

0.12s-0.2s

100

What is the function of gain on an EKG machine?

adjusts the height

200

What is Lead II

Right arm to left leg

200

What leads are Bipolar

I,II,III

200

What view of the heart is aVR

Right side of heart

200

How do you calculate the heart rate using the 6 second method?

count the number of QRS complexes and multiply by 10

200

What is the normal speed?

25mm

300

What is Einthovens Triangle?

Formed by leads I, II, III
300

Which leads are augmented

AVR, AVL, AVF

300

What is the location of V1

4th intercostal space right sternal border

300

What is a normal QRS complex duration

<0.12s

300
What is a normal gain?

10mm

400

What is Lead III

Left arm to Left leg

400

What view of the heart is AVF

Bottom of the heart (foot)

400

What view of the heart is aVL.

Left side of the heart

400

How do you calculate a heart rate using the 1500 method?

count the number of small boxes between two R waves and divide 1500 by that number

400

If I have a fast rhythm greater than 150bpm what should I change the speed to?

50mm/s

500

What is Wilson's Central Terminal

Forms the center of Einthoven's triangle, neutral point, umbilicus

500

What is the location of V9

Paraspinal border @ the level of V7 and V8

500

What is the location of V6

5th intercostal space axillary line

500

How do you calculate the heart rate using the 300 method?

Count the number of big boxes between two R waves and divide 300 by that number

500

What is another word for gain?

Amplitude