Cerebromicrovascular Disease in Elderly with Diabetes 1.0.1

File: <base>/Data_Description/GE-79_Files_and_Channels.csv (11,973 bytes)
VisitPhysionetDirectoryFilenameFormatChannelsSampling rateLabeldescriptionunitsCalibrationEquipmentCalibration/Device output sampling rateExperimentVisitFiles
ScreeningNot uploadedScreeningMedical history
TCD window
Blood draw
MMSE
PCP permission
ScreeningData/ECG24 hour ECG and EMG monitoringECGME6000ME6000 files (ECG and EMG files were recorded during the protocol walking test, and during the daily activity and sleeping)
12 min walkME600051000Hz
sleepS####ECG.dat
S####ECG.hea1ECG 1CH1 V5/V6-L clavicle
2ECG 2CH2 V1/V2 L clavicle
3foot switchright
4foot switchleft
5EMGgastrocnemius right
6EMGgastrocnemius left
7accelerometer
8empty
Visit 1/Day 1Not uploadedRetinal ImagingRetinal Imaging
Visit 1/Day 1Not uploadedCognitive testingCognitive
Visit 1/Day 2Data/labviewLabviewHead up tiltVasoreactivity, Valsalva maneuver, Head up tilt
with TCD
Valsalva manuever
5 min supine baselineS####DA.datLabview10500 HzVisit 2
3 min hyperventilationS####DA.heaBaseline values of Day 1 and Day 2 Procedures.
3 min CO2 rebreathing1MarkerVisit 8
5 min supine rest2ECG24-months Follow-up values of Day 1 and Day 2 Procedures.
Head up tilt 10 min3ABP*100
4Mcar
5Mcal
6Radi
7Therm
8Flow
9O2*9.09
10.CO2*7.74
Visit 1/Day1Not uploaded24-hr-bp24 hour BP monitoringtext24 hour BP20 min day, 30 min night
Automated BP measurements every 20 min during daytime and at 30 min at night for 24 hours
SxxxxA.Rraw file1date
SxxxxA.Vvalidated file2time
3status
SxxxxB.Rsecond recording 4systolic blood pressure
5diastolic blood pressure
6mean blood pressure
7heart rate
header subject ID, date, start time, end time, systolic and diastolic data threshold
Visit 1/Day 1Not uploadedportapres-newPortapress resting continuous beat-to-beat BP for 1.5/2 hours in supine or sitting position
portapresPortapress
beatscope-program
Continuus beat-to-beat BP monitoring in reclining sitting or supine position for 1.5 - 2 hours while subject is resting using beatscope program.
Sxxxxsabeat1-x.datbinary proprietary format3100Hzfiles have anout 300-500 KB about 2 hours
Sxxxxsa1-x.dat1time ( seconds)
Sxxxxsb1-x.dat2Portafinger blood pressure waveformmmHg
3HeightmmHg
Day 1Not uploadedPedarWalk test 1&2 ( walk1 around 11 am and walk 2 in the afternoon, normal hallway walking for 12 min recorded with EMG channels using ME6000) and foot pressure distribution using pedar moile, some subjects also have Portapress beat-to-beat blood pressureME6000
Walking test- foot pressure distribution and walking characteristics using Pedar Mobile
SxxxxS-1.ascPedar99N/cm2calibratedPedar Mobile X, Novel , Munich GE50 Hz
SxxxxA-1.ascascii1filename Xxxxx-1*.sols
2insole type%
3date/time
4total time (seconds)
5time per frame (s econds : 0.02)
6pressure values in N/cm2
7mask definition ( e.g.M1)
channel 8-99sensor values
SxxxxA-9rgtextmap of 9 regions
note filenames inconsistent but this is calibration file for each recording
SxxxxS-1.gtctext16
SxxxxSA-1.gtc.xlsExcelheader: filename, left insole #, right insole #, mean step left, mean step right, min and max step, total time (s econds), distance ( meters),velocity (m/s)
1step #
2foot ( 1,2)
3max force (N)
4mean force (N)
5max pressure [N/cm2]
6start
7start in % of total time
8stride
9step #
10stance
11stance in % of stride
12swing
13swing % init
14double in %
15single limb support
16terminate double support %
Day 2data/labviewLabviewVasoreactivity, Valsalva maneuver, Head up tilt
with TCDTCD
Valsalva manuever
5 min supine baselineS####DB.datLabview10500 HzV
3 min hyperventilationS####DB.hea
3 min CO2 rebreathing1markerbaselineValsalva maneuverhyperventilationCo2 rebreathinghead-up tiltbaseline
5 min supine rest2ECGECG
Head up tilt 10 min3ABPfinger blood pressure waveformmmHg*100Finapress100 HZ
4Mcarright middle cerebral artery flow velocity waveformcm/sMulti
5Mcalleft middle cerebral artery flow velocity waveformcm/sMultiDop X4, DWL Neuroscan Inc, Sterling, VA; 50 Hz
6Radiradial artery flow velocity waveformc,/s
7Thermstrespiration with nasal thermistorrelativethermisor
8Flow raterespiration flow rate???Capnomac Ultima
9O2end tidal O2mmHg*9.09Capnomac Ultima
10CO2end tidal CO2mmHg*7.74Capnomac Ultima
Day 2data/labviewlabview-sit-to-standSit-to-stand Test
5 min sitting with eyes open on balance platform with simultaneous cardiovascular, TCD
5 min standing with eyes open on balance platform with simultaneous cardiovascular, TCD and balance measures
5 min sitting with eyes closed on balance platform with simultaneous cardiovascular, TCD
5 min standing with eyes closed on balance platform with simultaneous cardiovascular, TCD and balance measures
S####DC.datLabview151000 HzV
S####DC.hea
1markersitting 5minstanding eyes open 3minsittingstanding eyes closed
2ECGECG
3ABPfinger blood pressure waveformmmHg*100Finapress
4Mcarright middle cerebral artery flow velocity waveformcm/sMulti
5Mcalleft middle cerebral artery flow velocity waveformcm/sMultiDop X4, DWL Neuroscan Inc, Sterling, VA;
6Radiradial artery flow velocity waveformcm/s
7Thermstrespiration with nasal thermistorrelativethermisor
8Flow raterespiration flow rateml/sCapnomac Ultima
9O2end tidal O2mmHg*9.09Capnomac Ultima
10CO2end tidal CO2mmHg*7.74Capnomac Ultima
11fxsway trajectory in mediolateral directionmmKistler Force plate, Amherst MA
12fysway trajectory in anteroposterior directionmm
13fzsway trajectory in vertical directionmm
14pxcenter of pressure x componentmm
15pycenter of pressure x componentmm
S#####DC.ch1-10.datLabview101000 Hz
1marker
2ECGECG
3ABPfinger blood pressure waveformmmHg*100Finapress
4Mcarright middle cerebral artery flow velocity waveformcm/sMulti
5Mcalleft middle cerebral artery flow velocity waveformcm/sMultiDop X4, DWL Neuroscan Inc, Sterling, VA;
6Radiradial artery flow velocity waveformcm/s
7Thermstrespiration with nasal thermistorrelativethermisor
8Flow raterespiration flow rateml/sCapnomac Ultima
9O2end tidal O2mmHg*9.09Capnomac Ultima
10CO2end tidal CO2mmHg*7.74Capnomac Ultima
Not uploadedanatomial and perfusion MRIoutputMRI- anatomical, CBF regional perfusiona dn paerfusion in vascular territories; CO2 vasoreactivity to hyperventilation and C02 rebreathing
processed data are available in the summary Table3Tesla GE Signa Vhi or Excite scanner and phase arrays head coil ( GE Medical Systmes, Milwaukee, WI)
MP-RAGE
MP-RAGE) (repetitionml or % of total brain volume
time [TR]/echo time [TE]/inversion time [TI]  7.8/3.1/600
msec, 3.0 mm slice thickness, 52 slices, bandwidth  122 Hz
per pixel, flip angle  10°, 24 cm  24 cm field of view [FOV],
256  192 matrix size)
FLAIRfluid-attenuated inversion recovery
(FLAIR) (TR/TE/TI  11,000/161/2,250 msec, 5 mm slice
thickness, 30 slices, bandwidth  122 Hz per pixel, flip angle 
90°, 24 cm  24 cm FOV, 256  160 matrix size),
DWIdiffusion-weighted image (b value of 1,000 seconds/
mm2, TR/TE  10,000/86.6 msec, 5 mm slice thickness, bandwidth
 250 kHz, 128  128 matrix size
CASLCBFthree-dimensional stack ofmL · 100 g1 · min1
interleaved spirals fast spin echo sequence (TR/TE  6,000/
23.8 msec, echo train length  66, with a 18  18 cm FOV, in
the coronal plane and 64 slices with thickness  3.8 mm, eight
see Zhao et al. Neurology 2009 ;72:643-649 for procecessing detailsspiral interleaves, two averages and a bandwidth62.5 kHz).
Transcranial Doppler
TCD exported ALL
SxxxSB.xl0ascii11 channelsbaseline, Valsalva menuever, head up tilt
Sxxx sb.xl1 sit-to-stand testsit-to-stand test
time
MCAR Mean- Blood Flow velocity in right middle cerebral artery
MCAR empty
MCAR-empty
MCAL -Mean Blood Flow velocity in the left middle cererbal artery
BRAR- blood flow velocity in the brachial artery
ABP- fingernoninvasive blood pressure waveform
CO2- tidal CO2 ??
ET CO2- end tidal expiratory CO2
RSP- respiratory waveform
ECG