Equipment & Functions

Question 1

Where are the 12 lead wires located?

Answer 1

• 8 are chest leads

* 4 are limb leads

Question 2

What are the 12 circuits being produced?

Answer 2

• 3 are bi-poplar
• 3 are unipolar
• chest circuits are unipolar

Question 3

What are the 3 bipolar leads for Einthoven’s Triangle?

Answer 3

• LEAD 1 = Tracing from left arm to right arm
• LEAD 2 = Tracing from right arm to left leg
• LEAD 3 = Tracing from left arm to left leg

Question 4

What are CHEST LEADS?

Answer 4

• They’re precordial leads

* Numbered form V1-V6 and measure in one direction

Question 5

INPUT:

Answer 5

Receiving impulse from electrode

Question 6

SIGNAL PROCESSING:

Answer 6

Amplification of signals inside the machine = Augmented Leads

Question 7

OUTPUT DISPALY:

Answer 7

A screen or printed report

Question 8

COMPUTERIZED MEASUREMENTS:

Answer 8

ECG’S program, hard drive and processor

Question 9

COMMUNICATION:

Answer 9

Networking abilities that allow info to be sent to other machines or locations

Question 10

INTERPRETATION:

Answer 10

Hint given by the machine on the issue of the heart

Question 11

SPEED:

Answer 11

• Standard speed is 2 mm/s unless,

* Patient has a fast heart rate or patient is a child, in this case speed is 50 mm/sec

Question 12

GAIN:

Answer 12

Controls the height of ECG waveforms

• Standard height is 10 mm/mv
• If too tall lower to 5 mm/mv
• If too small raise to 15 mm/mv

ALWAYS NOTE CHANGES IN REPORT

Question 13

ARTIFACT FILTER:

Answer 13

A filter that detects and prevents abnormalities from being marked, is automatically enabled

Question 14

HEART RATE LIMIT ALARM:

Answer 14

An alert that notifies when a patients heart rate goes above or below an established limit

Question 15

LEAD SELECTOR:

Answer 15

A way to specify the lead that one wants to read on the machine

Question 16

GRAPH PAPER:

Answer 16

A thermal paper that is sensitive to alcohol, plastic, sunlight, x-ray films, and certain metals