Centro Nacional de Investigaciones Cardiovasculares Carlos III (F.S.P.) May 29 2026 A study led by scientists at the Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC) provides new insights into ventricular fibrillation (VF), the most dangerous type of cardiac arrhythmia. The study, published in the journal Cardiovascular Research , demonstrates that electrical signals recorded during cardiac arrest caused by VF provide crucial information about damage to the heart and other