Neath Port Talbot hospital were unable to submit blood pressure monitoring, echo cardiogram and heart rhythm sub-speciality data for August and September 2020.
Nid oedd ysbyty Castell-nedd Port Talbot yn gallu cyflwyno data monitro pwysedd gwaed, ecocardiogram a data is-arbenigedd rhythm y galon ar gyfer mis Awst a mis Medi 2020.