At which point would you consider transport or a load and go approach then? On all vfib arrests provided the right facility is within an appropriate distance?
With the facilities of the County I currently work in I am still more inclined to not transport until I get ROSC. At which point I would rip off an EKG and transmit it to the ER so they can notify the cath lab if necessary.
I would suggest if you cannot reasonably identify a specific reversible cause you work the code to termination on scene. Like I said, according to the numbers, it is your best chance.
If a specific cause is suspected, with a facility capable of treating it is close enough (pathology specific on the distance) I would support a decision to transport as soon as reasonably possible.
I agree with all of your stated concerns about safety, and suggest a more measured approach than tearing through the streets like a maniac.
I have noticed that most providers who get into a rush are uncomfortable.
Take a breath. Maintain quality CPR. Since CPR is what is keeping the person alive with some possible exceptions like trauma and poisoning, that needs to be the priority no matter what the other suspected etiology.
That may mean that the event escalates from a 2 person medical emergency to a rescue requiring constant effective CPR. This is not the time for haste, it is for calm and calculated action.
Becase of multiple documented cases of survival with neuro intact discharge with prolonged CPR, as long as CPR is maintained, again, with some exceptions like trauma and poison, time is not really the issue. Quality CPR is.
In the name of safety, I advocate against using lights and sirens, even in these cases.
Safety taking priority over a
possible save.
Early vfib is pretty much undisputably best treated with dfib, and that also should be done per the conventional wisdom. However, recurrant vfib or resistant vfib may still be salvagable with more advanced treatment than available to EMS.
Try to avoid the pitfall of seeing resuscitation as all or nothing. It is a process.
It sounds like you have mastered the numbers game of cardiac arrest. I encourage you to not settle for that and broaden your expertise to cover a wider range of patient conditions.