Table 1.

Numbers of patients and recordings in the training, validation, and test databases for the Challenge. The training set includes data from the China Physiological Signal Challenge 2018 (CPSC), the St. Petersburg Institute of Cardiological Technics (INCART), the Physikalisch-Technische Bundesanstalt (PTB), and the Georgia 12-lead ECG Challenge (G12EC) databases. The validation set includes data from the CPSC and the G12EC databases. The test set includes data from the CPSC, the G12EC, and the undisclosed databases.

Database	Total patients	Recordings in training set	Recordings in validation set	Recordings in test set	Total recordings
CPSC	9458	10 330	1463	1463	13 256
INCART	32	74	0	0	74
PTB	19 175	22 353	0	0	22 353
G12EC	15 742	10 344	5167	5167	20 678
Undisclosed	Unknown	0	0	10 000	10 000
Total	Unknown	43 101	6630	16 630	66 361