Specifications

7 x 9 inches (178 mm x 229 mm)
Medtronic Confidential
Refer to the “Reference man.” category in doc#163256 for Printing
Instructions.
196407001 Rev A
radiopaque ID - a small metallic plate (inside the pacemaker connector)
bearing both the Medtronic logo and a code for identifying the
pacemaker under fluoroscopy.
real-time measurement - a pacing system function that presents measured
and calculated data at the time of the clinician’s query via programmer
telemetry.
retrograde conduction - the propagation of ventricular depolarization to
the atria, also known as “VA conduction.”
rolling trend - a type of continuous diagnostic data collection whereby
data is recorded by the pacemaker continuously such that new data
overwrites the old data once memory capacity is reached.
safety margin - 1) the difference between the measured stimulation
threshold and the programmed output voltage. Output settings that
produce a margin of twice the stimulation threshold are necessary
because of threshold variability due to exercise, eating, sleeping, drug
therapy, and other changes in cardiac condition. 2) safety margin,
voltage - a factor defined as the ratio of the programmed output voltage
divided by the stimulation threshold voltage (see “Strength-Duration
Test”) to achieve adequate pacing voltage and duration to prevent loss of
capture.
sensing threshold - the minimum signal strength (highest Sensitivity
setting) that allows continuous sensing of intrinsic depolarizations.
sensitivity - the degree to which a pacemaker’s sense amplifiers are
responsive to levels of electrical activity in the heart (or other electrical
signals).
sensor-indicated rate - the pacing rate determined by the sensor-detected
level of patient activity and on programmed rate response parameters;
this rate is never greater than the Upper Activity Rate or less than the
operating lower rate.
status reset - a pacing system command which attempts to reset an
electrical reset or the elective replacement indicator.
stimulation threshold - the minimum electrical stimulus needed to
consistently capture the heart. It can be expressed in terms of amplitude
(volts, milliamps), pulse width (milliseconds), and/or energy
(microjoules).
I-6 Prodigy Reference Information
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