English to Italian Medical Medical: Cardiology pacemaker

However, Greatbatch’s device had problems. It was sealed
with electrical tape, so body fluids caused it to malfunction after
a few hours. “The warm moist environment of the human
body
proved a far more hostile environment than outer space or the
bottom of the sea,” Greatbatch wrote. So he worked to cast the
electronics in solid epoxy to make them more impervious, thus
increasing their life span to four months. With no external funding,
and splitting his time between Chardack’s crowded lab
and a small workshop in the barn behind
his house,
Greatbatch
worked on the critical problems standing in the way of permanent
cardiac pacing: battery life, proper insulation, and rising
stimulation thresholds requiring higher and higher current to
control the heart over time. (In the process
Greatbatch invented
the first long-lasting
lithium battery, still in use today.