User's Manual

Cardiac Airbag Technical Manual 29
2.4.1 Shock Therapy
The Cardiac Airbag ICDs offer shock therapy only for the VF rate
classifications. Up to 8 shocks are available for the VF zone for
each episode detected.
The first defibrillation shock in the therapy sequence is delivered
with confirmation (while the
capacitors are being charged). The
ble and
predetermined to deliver 30 joules using defibrillation without
e a standard biphasic waveform
if a tachyarrhythmia
has spontaneously terminated. The programmed shock will be
or a normal sinus rhythm is
detected during the Confirmation period. Confirmation is always
Confirmation OFF - When Confirmation is OFF, shock therapy
onization period
ck therapy is aborted. However if the
thmia, the device
first shock energy is programmable to 20 or 30 joules and is
delivered following confirmation of the arrhythmia. The
remaining shock energies are non-programma
confirmation. All shocks utiliz
and normal polarity.
2.4.1.1 Number of Shocks
The number of shocks defines the total number of shock
attempts for each VF detection. Up to 8 shocks are available in
this therapy zone. The first shock energy parameter is
programmable to 20 or 30 joules, while the remaining shocks are
fixed at 30 joules.
2.4.1.2 Confirmation
Confirmation is used to verify the presence of a tachyarrhythmia
during the charging of the capacitors. This function is designed
to avoid delivery of inappropriate therapy
delivered unless bradycardia
ON for the first shock therapy and is always OFF for remaining
shock therapies.
will be delivered to the patient during the synchr
regardless of the detected cardiac signal.
Confirmation ON - If the tachyarrhythmia spontaneously
converts to bradycardia or a normal sinus rhythm during the
confirmation period, sho
device confirms the presence of the tachyarrhy
will deliver the programmed shock therapy.