Ventricular fibrillation waveform characteristics of the surface ECG: Impact of the left ventricular diameter and mass.

Abstract:

BACKGROUND:Despite a promising association between VF waveform characteristics and prognosis after resuscitation, studies with VF-guided treatment have so far not improved outcomes. While driven by the idea that the VF waveform reflects arrest duration, increasing evidence suggests that pre-existent disease-related changes of the myocardium affect ECG-characteristics of VF as well. In this context, we studied the impact of the left ventricular (LV) diameter and mass. METHODS:Cohort of 193 ICD-patients with defibrillation testing at the Radboudumc (2010-2014). Surface ECG-recordings (leads I,II,aVF,V1,V3,V6) were analysed to study amplitude and frequency characteristics of the induced VF. Both for LV diameter and mass, patients were categorised in two groups, using echocardiographic data (ASE-guidelines). RESULTS:In all ECG-leads, dominant and median frequencies were significantly lower in patients with (n=40) than in patients without (n=151) an increased LV diameter. The mean amplitude and amplitude spectrum area (AMSA) did not differ. In contrast, we observed no differences in frequency characteristics in relation to the LV mass, whereas mean amplitude (I,aVF,V3) and AMSA (I,V3) were significantly higher in patients with (n=57) than in patients without (n=120) an increased LV mass. CONCLUSIONS:Frequency characteristics of VF were consistently lower in case of an increased LV diameter. Whereas LV mass does not affect the frequency of the VF waveform, amplitudes seem higher with increasing mass. These findings add to the current knowledge of factors that modulate VF characteristics of the surface ECG and provide insight into factors which may be accounted for in future studies on VF-guided resuscitative interventions.

journal_name

Resuscitation

journal_title

Resuscitation

authors

Bonnes JL,Thannhauser J,Nas J,Westra SW,Jansen RMG,Meinsma G,de Boer MJ,Smeets JLRM,Keuper W,Brouwer MA

doi

10.1016/j.resuscitation.2017.03.029

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

82-89

eissn

0300-9572

issn

1873-1570

pii

S0300-9572(17)30124-7

journal_volume

115

pub_type

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