[time-nuts] Line Volytage frequency Interface

J. L. Trantham jltran at att.net
Mon Nov 28 23:40:18 EST 2011


I don't think touching a 9 V battery to your tongue is likely to induce
ventricular fibrillation.  However, in the mid 1980's, when implantable
defibrillators were first introduced and required opening the chest to
attach 'patches' directly to the heart in order to deliver the 'shock', we
routinely induced VF by applying  9 VDC from a 9 V battery directly to the
heart.  We induced VF to 'test' the system to be sure that it would be able
to resuscitate the patient if and when needed.

Now days, the device is implanted under local anesthesia with transvenous
leads very much like implanting a pacemaker.  However, we still induce VF to
test the system after implantation.  The devices now have elaborate
algorithms built in to be able to induce VF without the need for a 9 V
battery.

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Malcolm
Sent: Monday, November 28, 2011 5:48 PM
To: time-nuts at febo.com
Subject: [time-nuts] Line Volytage frequency Interface

Just for the unwary I saw some statistics about causes of death a while ago.
Amongst them was the fact that, on average,

 THREE PEOPLE A YEAR DIE FROM TESTING 9 VOLT BATTERIES ON THEIR TONGUES IN
THE UK.

I recently joined St John Ambulance as a volunteer and I would much rather
not have to use my CPR skills on a fellow Time Nut. 

Please always think safety first.

Malcolm
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