Before revision: We report Lobachevsky University Database (LUDB) of ECG signals that contains 200 recordings of 10-second 12-lead electrocardiograms (ECG) from different subjects  .
After revision: We report Lobachevsky University Database (LUDB) of ECG signals , an open tool for validating ECG delineation algorithms, that is superior to the existing publicly available data bases in several aspects. LUDB contains 200 recordings of 10-second 12-lead electrocardiograms (ECG) from different subjects .