System monitoring ECG sample labelings are described for promptly checking by expert, the device of electrocardiogram (ECG) signal and clung body including monitoring patient, including multiple electrodes. Based on the ECG signal monitored, detects rhythm abnormality patient detection ECG samples and be collected, about the rhythm abnormality detected. With one or more features aspect and each ECG samples, feature is used to mark ECG samples for promptly checking by expert.
