biomedical and healthCAre Data Discovery Index Ecosystem
biomedical and healthCAre Data Discovery Index Ecosystem
| Title: | Telemetric and Holter ECG Warehouse (THEW): Exercise testing and perfusion imaging ECG Data
|
| dateReleased: |
01-01-2015
|
| description: |
High-Resolution 12-lead continuous ECG from Patients undergoing Bruce protocol and myocardial perfusion imaging
Study Design: This database includes 927 patients referred for exercise myocardial perfusion single photon emission computed tomography (SPECT) in two medical centers (Assuta Medical Center, and Sheba Medical Center). High resolution 12 lead ECG (HyperQ Stress System, BSP Ltd, Tel Aviv, Israel) was continuously recorded throughout baseline, exercise and recovery phases. ECG acquisition was performed at a rate of 1000 samples/second using 16 bit resolution (measurement sensitivity < 0.15V), with an analog frequency response of 0.05 to 125Hz. Conventional ECG monitoring during the exercise test was either extracted automatically from the high resolution ECG traces or acquired using an additional ECG device (Q-Stress, Quinton Inc, WA), using a second set of 10 electrodes. The patients underwent either stress/rest 99mTc-sestamibi gated SPECT, or stress/ redistribution 201Tl SPECT. Perfusion images were visually scored using a 20-segment model of the left ventricle and a 5-point scale (0=normal tracer uptake, 1=mildly reduced, 2=moderately reduced, 3=severely reduced, 4=no uptake). This analysis was performed by expert interpreters (TS or PC), over-riding automatic segmental scores, obtained by commercial software (QPS, Cedars Sinai Medical Center, Los Angeles, CA). The summed stress score and summed rest score were calculated as the sum of the individual segment scores for the stress and rest images and converted to percent total myocardium (% myocardium) by dividing by 80 (maximal potential score = 4 20). The amount of ischemic myocardium (IM) was calculated as the summed difference score (the difference between summed stress and summed rest scores) divided by 80. Patients were classified as: no ischemia or equivocal (IM<5%), mild ischemia (5%=IM<10%) and moderate/severe ischemia (IM=10%).
|
| privacy: |
information not available
|
| aggregation: |
instance of dataset
|
| availability: |
THEW Data Use Agreements (see Thew website for details)
|
| refinement: |
raw
|
| ID: |
handle:11614/724
|
| types: |
image
|
| landingPage: | http://thew-project.org/register_main.htm |
| ID: |
doi:10.1016/j.jelectrocard.2010.07.015
|
| accessURL: | http://thew-project.org/register_main.htm |
| storedIn: |
CardioVascular Research Grid
|
| format: |
.ecg, .ann
|
| accesstypes: |
Landing Page
|
| authentication: |
none
|
| authorization: |
none
|
| abbreviation: |
JHU
|
| homePage: | http://www.jhu.edu/ |
| ID: |
SCR:010247
|
| name: |
Johns Hopkins University
|
| abbreviation: |
CVRG
|
| homePage: | http://www.cvrgrid.org/ |
| ID: |
SCR:004472
|
| name: |
CardioVascular Research Grid
|