In recognition of the importance of data quality to all of its registry products, and to ensure that data submitted to the NCDR are complete, consistent, and accurate, a Data Quality Program was formally established by the NCDR in 2004. Upon receipt of the LAAO Registry data submission, the ACC reviews the data electronically and reports back coding errors. Such electronic checks verify consistency and completeness and allow participants to have ample opportunity to submit data until it satisfies consistency and completion thresholds. The report produced from these data checks is called a Data Quality Report (DQR).