ECG - Myocardial infarction

Question 1

What does AV stand ford?

Answer 1

Augmented view

Question 2

What position can V1 and 2 be found in?

Answer 2

• Either side of the sternum,
• At the 4th intercostal space

Question 3

What position is V3 found in?

Answer 3

In between V2 and V4.

Question 4

What position is V4 found in?

Answer 4

• In the 5th intercostal space
• along the mid clavicular line

Question 5

What position is V5 found in?

Answer 5

• Anterior Auxilia line
• Along a vertical plane with V4

Question 6

What position is V6 found in?

Answer 6

• Mid auxilla line
• On a vertical plane with V4/5

Question 7

How long is recorded in each section of a 12 lead ECG?

Answer 7

• 2.5 seconds

Question 8

Where should R Wave progression be seen?

Answer 8

• V1-4

Question 9

What causes increased QRS complexes?

Answer 9

• Increased Potassium and Sodium, due to increased contraction of myocardial cells.

Question 10

Where should upright P waves be found?

Answer 10

• Leads 1 and 2
• V2 - V6

Question 11

How wide should Q waves be in L1, L2, V2- V6?

Answer 11

< 0.4s

Question 12

Where may show elevation even on an otherwise normal ECG12?

Answer 12

V1 - V2

Question 13

Where would upright T waves be found?

Answer 13

• Leads 1 and 2
• V3-V6

Question 14

What is a J point?

Answer 14

The Point where the QRS end and the ST Segment starts

Question 15

What does ST Depression indicate, in relation to the Myocardial issue?

Answer 15

Ischemia

Question 16

What is an inferior MI likely to cause?

Answer 16

Bradycardia

Question 17

What may show an ECG with a Pt symptomatic of angina?

Answer 17

• Wide spread ischemia
• T wave inversion

Question 18

What occurs in an area of ischemia?

Answer 18

• Metabolic changes
• CP and discomfort
• Nerve fibers remain intact.

Question 19

What occurs at the area of injury?

Answer 19

• Severe metabolic changes
• Increased permeability of cell membranes
• Increased sodium and water transport
• Increased odeama

Question 20

What is a Physiological P Wave?

Answer 20

The negative deflection that follows a P wave.

Question 21

What are the key features of a physiological P wave?

Answer 21

• QRS >o.03
• Amplitued .1/3 of the QRS

Question 22

What is pathological Q a sign of?

Answer 22

A Previous MI

Question 23

What needs to be taken into consideration with a pathological Q wave?

Answer 23

• Presence of a LBB
• The wide and depth of the Q qave
• Specific leads Q waves appear
• The other ECG appearance of the MI.

Question 24

Where would elevation be shown in a septal MI?

Answer 24

• V1 and V2

Question 25

Where would elevation be shown in an Anterior MI?

Answer 25

V3 and V4

Question 26

Where would elevation be shown in an inferior MI?

Answer 26

• L1, L2 and AVF

Question 27

Where would elevation be shown in a lateral MI?

Answer 27

L1, AVL, V5, V6,

Question 28

When should a posterior ECG be taken?

Answer 28

In a depressed V2

Question 29

What percentage of patients have MI with ventricular involvement?

Answer 29

• 30-50%

Question 30

Why should GTN be given with caution for a posterior/ right ventricular MI?

Answer 30

GTN can open up the right blood vessels and cause further pre load on the right side of the heart.

Question 31

What leads can be moved for a right sided view of the heart?

Answer 31

V3 and V4

Question 32

Where would you see reciprocal changes in an interior Mi?

Answer 32

L1, AVL

Question 33

Where would you see reciprocal changes of a lateral Mi?

Answer 33

L2, L3, AVF

Question 34

Where would you see reciprocal changes in a posterior MI?

Answer 34

V1, V2 and V3

Question 35

What is a posterior Mi?

Answer 35

An occlusion of the left circumflex or right coronary artery.

Question 36

What are the anterior lead changes in a posterior MI?

Answer 36

• Tall and slightly wide
• Depression of the ST segment
• Upright T Waves

Question 37

What rhythms commonly imitate a ST elevation/ Depression?

Answer 37

• LBBB
• Paced rhythms
• Ventricular rhythms
• Pericarditis