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Table 1 Data category description

From: Constrained transformer network for ECG signal processing and arrhythmia classification

Type Description
Atrial fibrillation (AF) Atrial fibrillation (AF) is characterized by the fibrillatory atrial waves and irregular conduction of QRS
First-degree atrioventricular block (I-AVB) First-degree atrioventricular block (I-AVB) is defined as constant PR intervals longer than 0.2 s
Left bundle branch block (LBBB) Left bundle branch block (LBBB) is diagnosed by the distinct QRS morphology at leads I, aVL, V1, V2, V5, and V6
Right bundle branch block (RBBB) Right bundle branch block (RBBB) is diagnosed by the rsR0pattern at V1 and V2
Premature atrial contraction (PAC) The premature atrial contraction (PAC) indicate the electrical impulse from an abnormal site; specifically, the P wave or QRS morphology of PAC differs from that in normal heart beats
Premature ventricular contraction (PVC) The premature ventricular contraction (PVC) indicate the electrical impulse from an abnormal site; specifically, the P wave or QRS morphology of PVC differs from that in normal heart beats
ST-segment depression (STD) ST segment is abnormal if either ST-segment depression (STD) is greater than 0.1 mV
ST-segment elevated (STE) ST segment is abnormal if either ST-segment elevation (STE) is greater than 0.1 mV