System and method of patient monitoring and signal quality analysis

A method of determining signal quality in a patient monitoring device, the method comprising:

• acquiring an electrocardiogram (ECG) signal using the patient monitoring device with at least one processor;
• determining, based on the ECG signal acquired by the patient monitoring device, one or more signal quality metrics with the at least one processor, wherein the one or more signal quality metrics include at least one beat noise flag;
• detecting, by the at least one processor, a noise condition based on the one or more signal quality metrics that include the at least one beat noise flag;
• classifying, by the at least one processor, the noise condition as intermittent or persistent based on a duration of the noise condition;
• and
• generating, by the at least one processor, an output comprising an identifier of the detected noise condition and a notification of a classification of the noise condition as intermittent or persistent.