Normal ECG

Question 1

What is represented by the P wave?

Answer 1

Atrial Depolarization

Question 2

In what leads should there be an upright P wave?

Answer 2

1,2,V4-V6, AVF

Question 3

In what leads should there be an inverted P wave?

Answer 3

AVR

Question 4

What makes up the PR interval?

Answer 4

The beginning of the P wave to the beginning of the QRS Complex

Question 5

What is represented by the PR interval?

Answer 5

Time from AV node to ventricular muscle fiber

Question 6

What is the length (in sec) of a normal PR interval

Answer 6

0.12-0.20 seconds

Question 7

What is happening during the QRS complex?

Answer 7

Ventricular depolarization

Question 8

How long (in seconds) is a normal QRS complex?

Answer 8

0.5-0.10 sec

Question 9

Q waves should not exceed _ sec in width?

Answer 9

0.03

Question 10

What are the general characteristics of a normal Q wave?

Answer 10

Narrow and small 1-2 mm in I, AVL, AVF, V5,V6

Question 11

What is a possible diagnosis with someone who have >0.12 QRS duration?

Answer 11

Bundle Branch Block or Hypertrophy

Question 12

What is the most important thing to view when viewing the ST segment?

Answer 12

Level relative to the isoelectric line

Question 13

What should a ST segment look like?

Answer 13

Isoelectric

Question 14

A ST segment is normal if it is elevated no > 1mm in _

Answer 14

Standard leads (I,II,III, AVF)

Question 15

A ST segment is normal if it is elevated no >2 mm in _

Answer 15

Chest leads (v1-v6)

Question 16

A ST segment is never more than _ mm depressed

Answer 16

0.5 mm

Question 17

If >0.5 mm depressed, an ST segment could be indicative of?

Answer 17

Subepericardial, transmural injury or ischemia

Question 18

What is represented by the T wave?

Answer 18

Ventricular Repolarization

Question 19

In which leads should the T wave be UPRIGHT

Answer 19

I, II, V3-V6

Question 20

In which leads should the T wave be INVERTED

Answer 20

AVR

Question 21

In which leads is the T wave VARIABLE

Answer 21

AVL, AVF, V1-V2

Question 22

What is the normal shape of a T wave?

Answer 22

Slightly rounded and asymmetrical Height no > 5 mm in standard leads Height no >10 mm in precordial leads

Question 23

What does the QT segment represent?

Answer 23

Length of ventricular systole

Question 24

What characteristic pattern is indicative in ischemia?

Answer 24

Inverted T waves

Question 25

What is the characteristiv pattern in myocardial injury?

Answer 25

ST elevation

Question 26

What is potentially indicative of a MI (myocardial infarction) on ECG?

Answer 26

Abnormal Q wave or QRS complex

Question 27

What are the key features of an ECG that you should always watch for?

Answer 27

• Rate
• Rhythm
• Axis
• P-Wave
• PR Interval
• QRS Interval
• QRS Complex
• ST Segment
• T Wave
• QT Interval

Question 28

What types of individuals can have elevated T waves?

Answer 28

Healthy! (normal ppl or athletes too)

Question 29

What does it mean to have a normal sinus rhythm?

Answer 29

There is a P wave preceding every QRS complex

Question 30

What constitutes tachycardia?

Answer 30

HR > 100 bpm

Question 31

What constitutes bradycardia?

Answer 31

HR < 60 bpm

Question 32

How do you calculate rate using an ECG?

Answer 32

Find an R wave that aligns on a dark line

Count to the next r wave

1st dark line=300

2nd dark line=150

3rd dark line=100

4th dark line=75

5th dark line=60

Question 33

What makes an ECG normal sinus rhythm?

Answer 33

P wave precedes QRS

P:QRS=1

Question 34

What is the rhythm if P follows QRS complex?

Answer 34

SVT or junctional rhythm

Question 35

What are possible diagnoses if a patient has no P wave in their ECG?

Answer 35

A-fib

Atrial flutter

Junctional or ventricular escape rhythms

Junctional tachycardia

VT (ventricular tachycardia)