Considering that in Brussels the first-aid ambulance team reaches the
patient in cardiac arrest 10 min before the physician-manned ambulance
, we instituted a feasibility study of early defibrillation by emergen
cy medical technicians (EMTs). Three hundred EMTs received a 20-h auto
matic external defibrillation (AED) training course followed by a refr
esher course every 6 months. of 316 cardiac arrests included in this s
tudy, asystole was encountered in 53% and ventricular fibrillation/ven
tricular tachycardia (VF/VT) in 33% of the cases on arrival of the EMT
s. In the VF/VT group, defibrillation was performed by EMTs with a Lae
rdal Heartstart 7-9 min before the medical team arrived. The overall c
ardiac arrest survival rate improved from 7% in 1989 to 19% in 1992. H
owever, the long-term survival rate (14/105) of ventricular fibrillati
on remained low because of excessive delays in emergency medical servi
ce (EMS) access and in early ACLS. In conclusion, this work shows that
in Brussels: (1) early defibrillation of cardiac arrest victims in VF
is feasible by EMTs when a training and a follow-up program are imple
mented; (2) the weakest link of the chain of survival is the early EMS
access, and the early ACLS; and (3) the AED program increases the int
erest and the efficacy of EMTs and medical teams in the management of
cardiac arrests.