INTRODUCTION AND OBJECTIVES The mechanisms that trigger ventricular fibrillation (VF) are poorly understood. The aim of this study was to analyze the initiation of VF in electrograms stored in implantable cardioverter-defibrillators (ICDs). METHODS We analyzed ICD electrograms from patients who had suffered at least one episode of VF. RESULTS Of 250 patients with ICDs, 13 (10 male and 3 fem...

AIMS Current guidelines do not advocate implantation of cardioverter-defibrillators (ICD) for survivors of ventricular fibrillation (VF) during the first 48 hours of ST-elevation myocardial infarction (STEMI). However, contemporary studies in a real-life setting with long-term follow-up are lacking. We assessed the prognostic impact of early VF in a non-selected population of STEMI patients tre...

PURPOSE To evaluate the strength and pattern of the relationship between visual field (VF) sensitivity and retinal nerve fiber layer (RNFL) thickness measurements by scanning laser polarimetry (SLP). METHODS Fifty-four eyes of 54 normal subjects (age, 42 +/- 15 years; VF mean deviation [MD], -0.69 +/- 1.01 dB) and 51 eyes of 51 glaucoma patients (age, 66 +/- 14 years; VF MD, -6.92 +/- 5.43 dB...

PURPOSE To compare the assessment of glaucomatous damage based on visual fields (VFs) derived from frequency-domain optical coherence tomography (OCT) to actual VFs obtained from static automated perimetry. METHODS A total of 84 eyes from 84 glaucoma patients or suspects and 128 eyes from 128 healthy subjects were included. The retinal ganglion cell (RGC) and retinal nerve fiber layer (RNFL) ...

Ventricular fibrillation (VF) is the most common arrhythmic cause of sudden cardiac death. The present recommendation for prevention of VF is ICD implantation. However, ICDs are costly; the shocks they give are often very uncomfortable for the patient and they may need reimplantation if there is battery depletion. Radiofrequency ablation of VF was pioneered by Haissaguerre1 and is presently bei...

Vector Fitting (VF) has been introduced as a partial-fraction basis response fitting methodology for over a decade. Because of its reliability and versatility, VF has been applied and extended to a number of areas. In this book chapter, we will discuss the applications of VF in the context of macromodeling of linear structures in signal/power integrity analyses. We will also discuss main featur...

Letter by Shiyovich et al Regarding Article, “Resumption of Chest Compressions After Successful Defibrillation and Risk for Recurrence of Ventricular Fibrillation in Out-of-Hospital Cardiac Arrest” In their study, Conover et al investigated whether ventricular fibrillation (VF) recurrence in first 30 s post shock of cardiac arrest victims with initial rhythm of VF is related to timing of post s...

Letter by Shiyovich et al Regarding Article, “Resumption of Chest Compressions After Successful Defibrillation and Risk for Recurrence of Ventricular Fibrillation in Out-of-Hospital Cardiac Arrest” In their study, Conover et al investigated whether ventricular fibrillation (VF) recurrence in first 30 s post shock of cardiac arrest victims with initial rhythm of VF is related to timing of post s...