Prognosis

The risk of VF is increased with ^b

• young age
• current smoking
  
• admission bradycardia
• hypotension
  
• an inferioposterior infarct
• widespread ST elevation
  
• hypokalaemia

Why?

Hypokalaemia, hypotension and smoking increase the risk of VF

Patient	Prognostic Factor	Outcome	CER	OR (95% CI)	NNF+ (95% CI)
first myocardial infarction b	serum K= <3.6 mmol/l   independent	VF at 6 months	5.6%	1.97 (1.51 to 2.56)	270 (13 to 38)
	systolic BP <120 mmHg independent			1.74 (1.34 to 2.56)	27 (16 to 57)
	current smoking independent			1.66 (1.15 to 2.41)	30 (14 to 130)
	>3 leads with ST elevation independent			1.66 (1.24 to 2.23)	30 (16 to 80)
	age <71 years independent			1.61 (1.08 to 2.40)	32 (15 to 240)
	inferioposterior infarct independent			1.45 (1.10 to 1.91)	43 (22 to 190)
	admission bradycardia (<60 beats/minute) independent			1.39 (1.05 to 1.84)	50 (24 to 380)