QuestionSBA
QuestionChoice
This answer is incorrect. Whilst the LAD is the most likely artery occluded in the scenario, it supplies the anterior heart. The lateral heart is supplied by the left circumflex artery which causes changes in leads I and aVL.
10007247
b
Left anterior descending (LAD) - lateral heart
QuestionChoice
This answer is incorrect. Whilst the left circumflex artery supplies the lateral heart, an occlusion would result in changes in leads I, aVL, V5, and V6.
10007250
e
Left circumflex artery - lateral heart
QuestionChoice
This answer is incorrect. The RCA supplies the inferior and posterior aspects of the heart which would result in changes to leads II, III and aVF on the ECG. The anterior heart is supplied by the LAD.
10007249
d
Right coronary artery - anterior heart
QuestionChoice
This answer is incorrect. Whilst the RCA supplies the inferior and posterior aspects of the heart, an occlusion would result in changes to leads II, III and aVF.
10007248
c
Right coronary artery (RCA) - inferior heart
QuestionChoice
This is the correct answer. The LAD supplies the anterior heart. An occlusion in the LAD results in changes to leads V1-V4.
10007246
a
Left anterior descending (LAD) - anterior heart
Concept
Chapter
2693
3799
ECG
Topic
159
Cardiovascular physiology
13996
A 62-year-old man presents to the Emergency Department with a 1-hour history of central crushing chest pain which radiates down his left arm. His past medical history includes angina, hypercholesterolaemia, and Type 2 Diabetes Mellitus.

On examination, he is pale, diaphoretic, and tachypnoeic. An ECG is performed which shows ST elevation in leads V1, V2, V3, and V4.

He is diagnosed with an ST elevation myocardial infarction (STEMI).

Which of the following arteries is most likely to be occluded and which area of the myocardium is affected?
a