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Appendix A. CD Datasets 295

- T wave: reflects the ventricular depolarisation and can be unipolar, positive or
negative, or bipolar (positive followed by negative or vice-versa).
The ECG Signals.xls file contains examples illustrating several wave
morphologies appropriate for testing structural description methods.
Text files obtained from ECG Signals.xls are also included, containing signals
processed by the SigParse program and illustrated in chapter 6.

Source: C Abreu Lima, JP Marques de Sa, Medicine Faculty, Engineering Faculty,
Oporto University.
Reference: C Abreu Lima, JP Marques de Sh (1990) Interpretation of Short ECGs
with a Personal Computer: The Porto Program. Methods of Information in
Medicine, Schattauer, 29:4 10-4 12.

A.7 Foetal Heart Rate Signals

The FHR Signals.xls file contains nine foetal heart rate (FHR) signals representing
three classes: A - calm sleep; B - rapid eye movement sleep; FS - Flat-sinusoidal
(pathologic).
Each FHR signal records the instantaneous frequency of the heart in beats per
minute. The signals were acquired at S. Jog0 Hospital, Oporto by an automatic
system (SisPorto). They are appropriate for training structural description of FHR
signals, namely the detection of spikes, accelerations and decelerations.
A text file obtained from FHR Signals.xls is also included, containing the signal
processed by the SigParse program and illustrated in chapter 6 (Figure 6.1 1).

Source: J Bernardes, Faculty of Medicine, Oporto University.
Reference: D Ayres de Campos et al. (2000) SisPorto 2.0 A Program for
Automated Analysis of Cardiotocograms. J Matern Fetal Med 5:311-318.

The FHR-Apgar.xls file contains 227 measurements of foetal heart rate tracings,
recorded just previous to birth, and the respective Apgar index, evaluated by
obstetricians according to a standard clinical procedure, one minute and five
minutes after birth. A11 data was collected in Portuguese Hospitals following a
strict protocol. The Apgar index is a ranking index in the [O, 101 interval, assessing
the well-being of the newborn babies. Low values (below 5) are considered bad
prognosis. Normal newborns have an Apgar above 6.
The following measurements are available in the FHR-Apgar.xls file:

Apgar 1 Apgar measured at 1 minute after birth
Apgar5 Apgar measured at 5 minutes after birth