Electrical requirements for ventricular defibrillation.Br Med J 1975; 2 doi: https://doi.org/10.1136/bmj.2.5966.313 (Published 10 May 1975) Cite this as: Br Med J 1975;2:313
- J F Pantridge,
- A A Adgey,
- S W Webb,
- J Anderson
Most deaths from ischaemic heart disease are sudden, occur outside hospital, and result from ventricular fibrillation. But defibrillators have only limited availability because of their size and weight. A miniature defibrillator has been developed. A singe low-energy shock succeeded in removing ventricular fibrillation in 73 out of 82 episodes, and a further shock was successful in seven more episodes. Primary ventricular fibrillation probably always responds to low-energy electrical shocks, which challenges the conventional view that correction of ventricular fibrillation requires high-energy direct-current shock. Thus even smaller and lighter defibrillators are possible. Furthermore low-energy shocks cause less myocardial damage.