Sep 2, 2015

Ventricular fibrillation waveform characteristics differ according to the presence of a previous myocardial infarction: A surface ECG study in ICD-patients

Resuscitation
Judith L BonnesJoep L R M Smeets

Abstract

Characteristics of the ventricular fibrillation (VF) waveform reflect arrest duration and have been incorporated in studies on algorithms to guide resuscitative interventions. Findings in animals indicate that VF characteristics are also affected by the presence of a previous myocardial infarction (MI). As studies in humans are scarce, we assessed the impact of a previous MI on VF characteristics in ICD-patients. Prospective cohort of ICD-patients (n=190) with defibrillation testing at the Radboudumc (2010-2013). VF characteristics of the 12-lead surface ECG were compared between three groups: patients without a history of MI (n=88), with a previous anterior (n=47) and a previous inferior MI (n=55). As compared to each of the other groups, the mean amplitude and amplitude spectrum area were lower, for an anterior MI in lead V3 and for an inferior MI in leads II and aVF. Across the three groups, the bandwidth was broader in the leads corresponding with the infarct localisation. In contrast, the dominant and median frequencies only differed between previous anterior MI and no history of MI, being lower in the former. The VF waveform is affected by the presence of a previous MI. Amplitude-related measures were lower and VF was les...Continue Reading

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Mentioned in this Paper

Surface Electromyography
Metabolic Process, Cellular
Establishment and Maintenance of Localization
Ischemia
Ophthalmoplegia
Study
Ventricular Fibrillation
Electrocardiogram Investigations
Amsacrine
Peri-Implantitis

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