Lab 2: Standard Resting ECGs

Question 1

What is the importance of standardization of ECGs?

Answer 1

Minimizes any differences b/t technicians and locations –> physicians can compare changes in the same individual over time and find the same diagnosis regardless of who performed the ECG

Question 2

What is the gold standard of ECGs?

Answer 2

12 lead ECG

Question 3

What does the 12-lead ECG consist of?

Answer 3

• 4 limb electrodes
• 6 precordial electrodes

Question 4

What do the electrodes do?

Answer 4

Measure voltage changes that occur b/t 2 pts and report these as either (+) or (-) and moving either towards or away from a particular pt

Question 5

What is a lead? What does it represent

Answer 5

Recording of voltage changes by the electrodes that represent diff views or perspectives of the heart

Question 6

What is a rhythm strip?

Answer 6

One or more leads recorded over a period of time (usually 10 secs)

Question 7

Where are the limb electrodes placed?

Answer 7

Anterior surface of both wrists and ankles

Question 8

Where are the precordial electrodes placed?

Answer 8

• V1 – Right 4th intercostal space adjacent to sternum
• V2 – Left 4th intercostal space adjacent to sternum
• V3 – Between V2 and V4
• V4 – Left 5th intercostal space at mid-clavicular line
• V5 – Level with V4 at anterior-axillary line
• V6 – Level with V4 at mid-axillary line

Question 9

What are all ECGs labeled with?

Answer 9

• Name
• Age
• Sex
• Height
• Weight
• Date and time
• Position and lead placement
• HR
• BP (L and R)
• Oral temp
• Meds
• Drug allergies