**2. Epidemiology**

CS is the second most common type of circulatory shock representing 16% of patients presenting with shock [3]. CS complicates up to 8.6% of patients with ST segment elevation myocardial infarction (STEMI) and about 2.5% of patients with non-ST segment elevation myocardial infarction (NSTEMI), and remains one of the leading causes of death in patients presenting with acute myocardial infarction (AMI) [4]. Despite the advancement in the medical and technological management, CS carries a poor prognosis with high morbidity and mortality (40–60% of patients with CS will die within 6 months) [5–7].

AMI is the most common cause of CS, and patients with AMI older than 75 years tend to present more frequently with CS than patients younger than 75 [2–4, 8].
