(10) ECG/ Myocardial Infarction (Johnston)

Question 1

For this lecture:

Read

Dubin p 259-294

Question 2

General Stats:

1 out of every ___ adults in US experiences coronary heart disease

Answer 2

6

(380,000 deaths per year)

Question 3

Most MIs caused by…

Answer 3

Atherosclerosis

Question 4

If cornoary flow is occluded,

This would produce a

Answer 4

STEMI

Question 5

If cornoary flow is partially occluded,

This would produce a

Answer 5

NSTEMI

Question 6

What are the classic clinical manifestations of an MI?

Answer 6

• Chest discomfort
• Heavy, pressure, crushing
• Neck, jaw, left arm, epigastrium
• Nausea, vom
• Not relieved with Nitro or rest

Question 7

American heart association definition of a STEMI?

Answer 7

ST elevation of 2mm or more at J point in V2-V3 in men

ST elevation of 1.5 mm or more at J point in V2-V3 in women

*OR: 1mm or more in 2 or more continguous chest or limb leads

Question 8

Difference between Non Stemi: NSTEMI and Non ST segment elevation acute cornary syndrome: NSTE ACS

Answer 8

Non Stemi: NSTEMI |

ST segment depression, T wave inversion, Chest pain, elevated cardiac enzymes

Non ST segment elevation acute cornary syndrome: NSTE ACS |

ST segment depression, T wave inversion, chest pain, normal cardiac enzymes

Question 9

What are the zones of infarction?

Answer 9

Question 10

What leads would you look for to identify a LAD/Anterior wall infarction?

Answer 10

V1-V7

Question 11

What leads would you look for to identify a RCA/Inferior wall infarction?

Answer 11

II, III, AVF, V3-V6

Question 12

What leads would you look for to identify a Circumflex artery MI/infarction?

Answer 12

I, AvL, V5-V6

Question 13

What leads would you look for to identify a posterior descending artery/posterior wall infarction?

Answer 13

V1-V3