Prognosis

Watch out for ^b

• arrhythmias
• mitral regurgitation
• ventricular septal rupture
• signs of heart failure
• post-infarct angina 

Why?

• Complications are common, particularly arrhythmias and cardiogenic shock. ^b
• Half of patients with inferior MI have complications (47%: 95% CI: 40% to 54%) ^a

Common complications include AV block, cardiogenic shock and ventricular fibrillation

Complication b	%  (95% CI)	NNF at 30 days  (95% CI)
AV block	8.2%  (7.9% to 8.5%)	12  (12 to 13)
ventricular fibrillation	6.6%  (6.4% to 6.9%)	15  (15 to 16)
sustained ventricular tachycardia	6.1%  (5.9% to 6.3%)	16  (16 to 17)
asystole	5.7%  (5.4% to 5.9%)	18  (17 to 18)
cardiogenic shock	7.2%  (7.0% to 7.5%)	14  (13 to 14)
acute mitral regurgitation	1.4%  (1.3% to 1.5%)	72  (66 to 78)
ventricular septal defect	0.48%  (0.41% to 0.54%)	210  (190 to 250)