Inclusion Criteria:  Subject is greater than or equal to 18 years of age. Subject who received the AtriClip FLEX-V or PRO•V implant during a non-emergent cardiac surgical procedure Subject is willing and able to provide written informed consent Subject is willing and able to return for scheduled follow-up visit and imaging (CTA or TEE)  Exclusion Criteria:  Inability, unwillingness, or contraindication to undergo TEE or CTA imaging Subjects who are pregnant or breast feeding Subjects with active COVID-19 infection