QuestionSBA
QuestionChoice
This patient has suffered an inferior wall STEMI. This occurs when the inferior cardiac tissue receives insufficient blood flow from the right coronary artery. This can be seen as ST-segment elevation in the inferior ECG leads (II, III, aVF)
10003551
a
Right coronary artery
QuestionChoice
Occlusion of the left anterior descending artery results in an anterior infarction. ECGs commonly show ST elevation in leads V1-6 and AVL. Anterior infarctions can be further classified into septal leads (V1-2), anterior leads (V3-4) and lateral leads (V5-6).
10003554
d
Left anterior descending
QuestionChoice
The left main coronary artery arises from the left coronary cusp and bifurcates into the left anterior descending (LAD) and left circumflex arteries. This causes ST elevation in aVR which is usually greater than the ST elevation in V1. Early identification is important as acute occlusion can cause rapid haemodynamic and electrical deterioration.
10003552
b
Left main coronary artery
QuestionChoice
The obtuse marginal artery is a branch of the lateral circumflex artery and supplies the lateral wall of the left ventricle. Occlusion of this artery usually causes a lateral MI.
10003553
c
Obtuse marginal artery
QuestionChoice
The left circumflex artery supplies the lateral wall of the left ventricle and causes ST elevation in the lateral leads (I,aVL, V5-6).
10003555
e
Left circumflex artery
Concept
Chapter
2693
3713
Myocardial infarction and Acute Coronary Syndrome (ACS)
Topic
134
Cardiology
13257
A 55-year-old female presents to ED complaining of excruciating central chest pain which radiates to the jaw. Investigations are carried out to find the underlying cause.

A 12-lead ECG is performed which shows ST elevation in leads II, III and aVF.

Which artery has been occluded in this myocardial infarction?
a