User Manual

Lumax Technical Manual 141
2.11.8 HF Monitor Statistics
The ICD/CRT-D stores a variety of useful diagnostic data related
to heart failure status as described in the following sections.
2.11.8.1 Patient Activity
The patient’s activity is
monitored based on the sensor indicated
pacing rate in both, rate adaptive and non-rate adaptive pacing
modes. The Lumax devices store information about the patient’s
activity level based on the sensor indicated pacing rate on a daily
basis. The device stores the time that the patient is active for
each 24-hour period. The time active is defined as the time where
the sensor indicated pacing rate is reached.
The sensor indicated pacing rate is the sensor rate above the
sensor’s threshold. The cumulative daily time when the sensor is
active is stored in the device for a period of 240 days. After 240
days, new daily values replace the oldest daily values.
2.11.8.2 Mean Heart Rate
The
mean heart rate is calculated based on both ventricular
sensed and paced events. All types of events, including VES
(PVC) shall be included in the calculation of the mean value. On a
daily basis, the device measures and stores the patient’s mean
heart rate over a 24 hour period and has a value range of 0 to
180 bpm. The daily value is stored for a period of 240 days. After
240 days, new daily values shall replace the oldest daily values.
The programmer presents the daily bpm-value in a trend graph
for the last 240 days.
2.11.8.3 Mean Heart Rate at Rest
On a daily basis, the Lumax CRT-D measures and stores the
patient’s
resting heart rate (MHRR). Average values are
calculated over a defined period. The daily value is based on the
smallest mean value in any evaluation window over the resting
period. The mean heart rate is calculated based on both
ventricular sensed and paced events. All types of events,
including VES (PVC) shall be included in the calculation of the
mean value.