User Manual

120 Lumax Technical Manual
2.10 EP Test Functions
Several EP test functions are available with the Lumax family of
ICD/CRT-Ds including; P and R-wave amplitude, pacing and
shock impedances, retrograde conduction and pacing threshold
measurements. Extensive testing of defibrillation thresholds as
well as the ability to verify the effectiveness of anti-tachycardia
pacing and defibrillation shocks are also available.
2.10.1 P and R-wave Amplitude Measurements
The Lumax ICDs/CRT-Ds provide a P-/R-wave test for measuring
the amplitude of intrinsic events during follow-up examination.
The test determines the amplitudes with a predetermined
temporary pacing mode.
To permit evaluation of the sensing function, the pacing rate must
be lower than the patient's intrinsic rate. In demand pacing, the
proper sensing function can be recognized if the interval between
intrinsic events and the following pacing pulse equals the basic
interval (if no Hysteresis is programmed). The following
parameters are programmable when performing the
measurements:
 Pacing Mode
 Ventricular Pacing (HF(-T) only)
 Pacing Rate
 Upper Rate (Dual Chamber modes only, not in Lumax
600/640 & 700/740 models)
 Pulse Amplitude (Not applicable to Lumax 600/640 &
700/740 models)
 Pulse Width (Not applicable to Lumax 600/640 & 700/740
models)
For evaluation of the sensing function, the pulse generator
features an intracardiac electrogram (IEGM) with marker signals
to indicate sensed and paced events.