QuestionSBA
QuestionChoice
A Non-ST-elevation MI (NSTEMI) is caused by a severe, but incomplete occlusion of a coronary artery. Blood tests would show raised troponin. The ECG can be normal or abnormal, but no ST-elevation would be seen.
10004812
b
Non-ST-elevation Myocardial Infarction (NSTEMI)
QuestionChoice
Cardiac tamponade occurs when there is an accumulation of a substance in the pericardial space, raising the intra-pericardial pressure and pressing on the heart. Cardiac output is reduced as a consequence. An ECG would show low-voltage QRS complexes or electrical alternans.
10004814
d
Cardiac Tamponade
QuestionChoice
Myocarditis is a disease where the myocardium becomes inflamed. Although patients present with similar symptoms of heart failure described above, ECG would demonstrate non-specific ST segment changes. Troponin enzymes would be elevated.
10004813
c
Myocarditis
QuestionChoice
An ST-elevation MI (STEMI) is caused by a complete occlusion of a coronary artery. It is characterised by diagnostic features of cardiac chest pain, persistent ST-elevation and/or new left bundle branch block on an ECG.
10004811
a
ST-elevation Myocardial Infarction (STEMI)
QuestionChoice
Heart blocks are caused by altered conduction through the AV node. A first-degree heart block can be identified on an ECG by finding a PR interval over 200 ms.
10004815
e
First Degree Heart Block
Concept
Chapter
2693
3713
Myocardial infarction and Acute Coronary Syndrome (ACS)
Topic
134
Cardiology
13509
A 73-year-old woman presents to the emergency department with sudden onset, severe, crushing, left-sided chest pain. An ECG is ordered and shows persistent ST-elevation with a new left bundle branch block. Blood tests have been ordered, but have yet to be completed.

Which of the following is the most likely cause of this patient's presentation?
a