A connector includes a housing, a female snap connector member carried by the housing and configured to mechanically and electrically connect to a male snap connector member of an electrode, a three-axis accelerometer carried by the housing and configured to sense proper acceleration of the connector, and a microprocessor in electrical communication with the snap connector and with the accelerometer. The microprocessor is configured to receive cardiac activity data from the electrode, to receive proper acceleration data from the accelerometer, and to correlate the cardiac activity data to the proper acceleration data to define processed data.
