Intracardiac Atrial Fibrillation Database

This database consists of endocardial recordings from the right atria of 8 patients in atrial fibrillation or flutter. A decapolar catheter with 2-5-2mm spacing (7mm spacing between bipoles) was placed in four separate regions of the heart. In each region, the 5 bipolar signals were recorded along with 3 surface ECG leads. Data were digitized at 1kHz. Catheter bipoles are labeled (distal to proximal) CS12, CS34, ..., CS90. Regions are:

SVC

The distal tip of the catheter (CS12) is close to the annulus of the superior vena cava

IVC

The proximal tip of the catheter (CS90) is close to the annulus of the inferior vena cava

TVA

The distal tip (CS12) is close to the tricuspid valve annulus

AFW

The entire catheter rests against the atrial free wall

The figure at left shows approximate catheter placement in a model heart (click on any panel at left, or on the links below, for a larger view):

A)

Anterior view of a heart model, with the interior of the right atrium (RA) and right ventricle (RV) exposed.

B)

Catheter placement for SVC, where the distal tip is just inferior to the annulus of the superior vena cava, and the catheter is against the posterior wall of the atrium. Eight poles (black marks) of the decapolar catheter model (copper wire) are visible.

C)

Placement for TVA, where the distal tip is on the tricuspid valve annulus and the electrodes are against the septal wall.

D)

Placement for IVC, with the proximal catheter end just superior to the annulus of the inferior vena cava, and the electrodes against the posterior wall.

E)

Placement for AFW, with the catheter against the atrial free wall (which is hinged open here).

The database includes a set of four records (one for each placement) for each of the eight patients. The name of each record identifies the patient (iaf1, iaf2, ..., iaf8) and the placement of the catheter (svc, ivc, tva, afw). Each record contains eight signals (intracardiac: CS12 - CS90, or ECG: I, II, V1, aVF). Each signal is sampled at 1 kHz with 14-bit resolution; the signal amplitudes are uncalibrated.

The atrial free wall (afw) records are considerably longer than those for the other regions, and include the effects of drug delivery and washout. During these records, patients iaf1, iaf2, iaf6, and iaf8 received adenosine, and patients iaf3, iaf4, iaf5, and iaf7 received Isuprel; the drug, dosage, and delivery time(s) are noted in the .hea files of the afw records. Note that these times are approximate, based on clinical notes taken during the procedure.

The .qrs annotation files were produced using sqrs, and have not been corrected; they may be useful for beginning a study of these recordings.

Acknowledgements

We wish to thank Jon Peterson and Dave Kynor of Creare, Inc. for their generous contribution of these recordings and for the notes and figures above.

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 ANNOTATORS              01-Mar-2003 11:04   31   list of annotators
 MD5SUMS                 12-Jul-2005 22:13  4.5K  
 RECORDS                 01-Mar-2003 08:57  288   list of record names
 SHA1SUMS                12-Jul-2005 22:13  5.4K  
 SHA256SUMS              18-Sep-2007 12:37  7.8K  
 figures/                01-Mar-2003 09:48    -   
 iaf1_afw.dat            01-Mar-2003 08:56  2.4M  digitized signal(s)
 iaf1_afw.hea            01-Mar-2003 08:56  537   header file
 iaf1_afw.qrs            01-Mar-2003 10:59  494   unaudited annotations
 iaf1_ivc.dat            01-Mar-2003 08:56  805K  digitized signal(s)
 iaf1_ivc.hea            01-Mar-2003 08:56  495   header file
 iaf1_ivc.qrs            01-Mar-2003 10:59  154   unaudited annotations
 iaf1_svc.dat            01-Mar-2003 08:56  898K  digitized signal(s)
 iaf1_svc.hea            01-Mar-2003 08:56  501   header file
 iaf1_svc.qrs            01-Mar-2003 10:59  204   unaudited annotations
 iaf1_tva.dat            01-Mar-2003 08:56  930K  digitized signal(s)
 iaf1_tva.hea            01-Mar-2003 08:56  499   header file
 iaf1_tva.qrs            01-Mar-2003 10:59  170   unaudited annotations
 iaf2_afw.dat            01-Mar-2003 08:56  3.5M  digitized signal(s)
 iaf2_afw.hea            01-Mar-2003 08:56  543   header file
 iaf2_afw.qrs            01-Mar-2003 10:59  856   unaudited annotations
 iaf2_ivc.dat            01-Mar-2003 08:56  1.0M  digitized signal(s)
 iaf2_ivc.hea            01-Mar-2003 08:56  507   header file
 iaf2_ivc.qrs            01-Mar-2003 10:59  234   unaudited annotations
 iaf2_svc.dat            01-Mar-2003 08:56  852K  digitized signal(s)
 iaf2_svc.hea            01-Mar-2003 08:56  511   header file
 iaf2_svc.qrs            01-Mar-2003 10:59  194   unaudited annotations
 iaf2_tva.dat            01-Mar-2003 08:56  1.0M  digitized signal(s)
 iaf2_tva.hea            01-Mar-2003 08:56  510   header file
 iaf2_tva.qrs            01-Mar-2003 10:59  224   unaudited annotations
 iaf3_afw.dat            01-Mar-2003 08:56   12M  digitized signal(s)
 iaf3_afw.hea            01-Mar-2003 08:56  534   header file
 iaf3_afw.qrs            01-Mar-2003 10:59  2.5K  unaudited annotations
 iaf3_ivc.dat            01-Mar-2003 08:56  1.0M  digitized signal(s)
 iaf3_ivc.hea            01-Mar-2003 08:56  514   header file
 iaf3_ivc.qrs            01-Mar-2003 10:59  230   unaudited annotations
 iaf3_svc.dat            01-Mar-2003 08:56  1.5M  digitized signal(s)
 iaf3_svc.hea            01-Mar-2003 08:56  509   header file
 iaf3_svc.qrs            01-Mar-2003 10:59  308   unaudited annotations
 iaf3_tva.dat            01-Mar-2003 08:56  750K  digitized signal(s)
 iaf3_tva.hea            01-Mar-2003 08:56  508   header file
 iaf3_tva.qrs            01-Mar-2003 10:59  144   unaudited annotations
 iaf4_afw.dat            01-Mar-2003 08:56   21M  digitized signal(s)
 iaf4_afw.hea            01-Mar-2003 08:56  540   header file
 iaf4_afw.qrs            01-Mar-2003 10:59  7.1K  unaudited annotations
 iaf4_ivc.dat            01-Mar-2003 08:56  948K  digitized signal(s)
 iaf4_ivc.hea            01-Mar-2003 08:56  506   header file
 iaf4_ivc.qrs            01-Mar-2003 10:59  258   unaudited annotations
 iaf4_svc.dat            01-Mar-2003 08:56  906K  digitized signal(s)
 iaf4_svc.hea            01-Mar-2003 08:56  502   header file
 iaf4_svc.qrs            01-Mar-2003 10:59  234   unaudited annotations
 iaf4_tva.dat            01-Mar-2003 08:56  1.0M  digitized signal(s)
 iaf4_tva.hea            01-Mar-2003 08:56  506   header file
 iaf4_tva.qrs            01-Mar-2003 10:59  250   unaudited annotations
 iaf5_afw.dat            01-Mar-2003 08:56   12M  digitized signal(s)
 iaf5_afw.hea            01-Mar-2003 08:56  527   header file
 iaf5_afw.qrs            01-Mar-2003 10:59  3.2K  unaudited annotations
 iaf5_ivc.dat            01-Mar-2003 08:56  1.0M  digitized signal(s)
 iaf5_ivc.hea            01-Mar-2003 08:56  482   header file
 iaf5_ivc.qrs            01-Mar-2003 10:59  322   unaudited annotations
 iaf5_svc.dat            01-Mar-2003 08:56  2.8M  digitized signal(s)
 iaf5_svc.hea            01-Mar-2003 08:56  491   header file
 iaf5_svc.qrs            01-Mar-2003 10:59  826   unaudited annotations
 iaf5_tva.dat            01-Mar-2003 08:56  820K  digitized signal(s)
 iaf5_tva.hea            01-Mar-2003 08:56  482   header file
 iaf5_tva.qrs            01-Mar-2003 10:59  288   unaudited annotations
 iaf6_afw.dat            01-Mar-2003 08:56  5.5M  digitized signal(s)
 iaf6_afw.hea            01-Mar-2003 08:56  544   header file
 iaf6_afw.qrs            01-Mar-2003 10:59  1.5K  unaudited annotations
 iaf6_ivc.dat            01-Mar-2003 08:56  906K  digitized signal(s)
 iaf6_ivc.hea            01-Mar-2003 08:56  511   header file
 iaf6_ivc.qrs            01-Mar-2003 10:59  250   unaudited annotations
 iaf6_svc.dat            01-Mar-2003 08:56  766K  digitized signal(s)
 iaf6_svc.hea            01-Mar-2003 08:56  510   header file
 iaf6_svc.qrs            01-Mar-2003 10:59  222   unaudited annotations
 iaf6_tva.dat            01-Mar-2003 08:56  852K  digitized signal(s)
 iaf6_tva.hea            01-Mar-2003 08:56  508   header file
 iaf6_tva.qrs            01-Mar-2003 10:59  272   unaudited annotations
 iaf7_afw.dat            01-Mar-2003 08:56   10M  digitized signal(s)
 iaf7_afw.hea            01-Mar-2003 08:56  529   header file
 iaf7_afw.qrs            01-Mar-2003 10:59  3.2K  unaudited annotations
 iaf7_ivc.dat            01-Mar-2003 08:56  1.7M  digitized signal(s)
 iaf7_ivc.hea            01-Mar-2003 08:56  497   header file
 iaf7_ivc.qrs            01-Mar-2003 10:59  570   unaudited annotations
 iaf7_svc.dat            01-Mar-2003 08:56  2.2M  digitized signal(s)
 iaf7_svc.hea            01-Mar-2003 08:56  495   header file
 iaf7_svc.qrs            01-Mar-2003 10:59  762   unaudited annotations
 iaf7_tva.dat            01-Mar-2003 08:56  1.8M  digitized signal(s)
 iaf7_tva.hea            01-Mar-2003 08:56  493   header file
 iaf7_tva.qrs            01-Mar-2003 10:59  702   unaudited annotations
 iaf8_afw.dat            01-Mar-2003 08:56  8.2M  digitized signal(s)
 iaf8_afw.hea            01-Mar-2003 08:56  520   header file
 iaf8_afw.qrs            01-Mar-2003 10:59  1.6K  unaudited annotations
 iaf8_ivc.dat            01-Mar-2003 08:56  922K  digitized signal(s)
 iaf8_ivc.hea            01-Mar-2003 08:56  478   header file
 iaf8_ivc.qrs            01-Mar-2003 10:59  194   unaudited annotations
 iaf8_svc.dat            01-Mar-2003 08:56  805K  digitized signal(s)
 iaf8_svc.hea            01-Mar-2003 08:56  481   header file
 iaf8_svc.qrs            01-Mar-2003 10:59  178   unaudited annotations
 iaf8_tva.dat            01-Mar-2003 08:56  875K  digitized signal(s)
 iaf8_tva.hea            01-Mar-2003 08:56  485   header file
 iaf8_tva.qrs            01-Mar-2003 10:59  172   unaudited annotations

Your comments and suggestions are welcome. We encourage you to use our feedback form to comment on this page. If you would like to receive a reply, please send your comments by email to webmaster@physionet.org, or post them to: PhysioNet MIT Room E25-505A 77 Massachusetts Avenue Cambridge, MA 02139 USA