Prognosis

Look for evidence of heart failure ^b particularly cardiogenic shock. ^a  
Cardiogenic shock which is relatively common and often fatal. ^a  

Why?

• 3.9% will develop congestive heart failure (95% CI: 3.5% to 4.3%) b
• One in fourteen patients develop cardiogenic shock in hospital (7.5%: 95% CI: 6.8% to 8.3%) ^{a b}
• Over half of patients with cardiogenic shock die (55% to 77%). ^a