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- CRP, C reactive protein
- EF, ejection fraction
- ICD, implantable cardioverter-defibrillator
- MADIT, Multicenter Automated Defibrillator Implantation Trial
- VF, ventricular fibrillation
- VT, ventricular tachycardia
Patients with ischaemic heart disease and low ejection fraction (EF) are at increased risk of sudden death. MADIT (Multicenter Automated Defibrillator Implantation Trial) II has shown that implantable cardioverter-defibrillators (ICDs) reduce the risk of death by 31% at two years in patients with previous myocardial infarction and EF < 30%.1 The absolute risk reduction over an average follow up of 20 months, however, was only 5.6%. In addition, the high prevalence of patients who have had a myocardial infarction with EF ⩽ 30% makes the cost of this strategy high. This has led to an ongoing search for reliable markers of future episodes of life-threatening ventricular tachycardia (VT) or ventricular fibrillation (VF) to identify a higher-risk subgroup in which ICD therapy can be more beneficial and cost effective.
The difficulty in predicting major ventricular arrhythmias probably reflects a limited understanding of their complex mechanisms. This is particularly true for patients who have had a myocardial infarction and with LV dysfunction, in whom myocardial ischaemia may trigger major ventricular arrhythmias. C reactive protein (CRP) concentration has been shown to be raised both in subjects studied …
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