User's Manual

Table Of Contents
thresholds, and impedance). The use of radiography may help ensure lead position and integrity. If testing
results are unsatisfactory, lead system repositioning or replacement may be required.
Connect the pace/sense lead(s) to a pacing system analyzer (PSA).
WARNING: For leads that require the use of a Connector Tool, use caution handling the lead terminal when
the C onnector Tool is not present on the lead. Do not directly contact the lead terminal with any surgical
instruments or electrical connections such as PSA (alligator) clips, ECG connections, forceps, hemostats, and
clamps. This could damage the lead terminal, possibly compromising the sealing integrity and result in loss
of therapy or inappropriate therapy, such as a short within the header.
Pace/sense lead m easurements, measured approximately 10 minutes after initial placement (acute) or
during a replacement procedure (chronic), are listed below. Values other than what are suggested in
the table may be clinically acceptable if appropriate sensing can be documented with the currently
programmed values. Consider reprogramming the sensitivity parameter if inappropriate sensing
is observed. Note that the pulse generator measurements may not exactly correlate to the PSA
measurements due to signal ltering.
Table 12. Lead measurements
Pace/ sense lead
(acute)
Pace/ sense lead
(chronic)
Shocking lead (acute
and chronic)
R-Wave Amplitude
ab
> 5 mV > 5 mV > 1.0 mV
P-Wave Amplitude
ab
> 1.5 mV > 1.5 mV
R-Wave Duration
bcd
< 100 ms < 100 ms
Pacing Threshold (right
ventricle)
< 1.5 V endocardial
< 2.0 V epicardial
< 3.0 V endocardial
<3.5Vepicardial
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