Biomedical Engineering Reference
In-Depth Information
Fig. 7.9
De fi brillation
leads - single coil DF-1,
dual coil 2 × DF-1,
single-coil DF-4, dual-coil
DF-4 [ 51 ] (© 2012 Boston
Scienti fi c Corporation or
its af fi liates. All rights
reserved. Used with
permission of Boston
Scienti fi c Corporation)
7.4
De fi brillation Leads
7.5
Left Ventricular Leads
for Cardiac Resynchronization
Therapy
Defibrillation leads ensure pacing and sensing and apply
electric shocks during cardioversion and defibrillation of the
automatic implantable defibrillation systems. Basic types of
the leads are equipped with one or two shock electrodes (see
Fig.
7.9
). According to their construction, we distinguish the
distal shock electrode from the electrically integrated or sep-
arated (dedicated, true bipolar) proximal pacing electrode.
The usage of defibrillation leads has the same limitations as
of the use of endocardial pacing leads.
The usage of left ventricular endocardial leads instead of the
originally used epimyocardial leads helps to decrease risk
for the patient undergoing implantation. It also shortens the
time of hospitalization and reduces total morbidity connected
with the intervention. The basic requirements for the left
ventricular leads are a flexible and mechanically safe distal
tine, a suitable diameter, the ability of the lead body to bend
