Data sources
A Beaumont Health registry was established to calculate all demographics, clinical characteristics, comorbid conditions, pertinent medications, and outcomes of patients who underwent left atrial ablation procedures. The data from the registry was abstracted through automated reports generated through a multi-platform database query tool from Beaumont Health’s electronic medical record. Demographics abstracted from the registry for the purpose of this study were age, sex, race, and weight. Comorbid conditions abstracted were hypertension, diabetes mellitus, coronary artery disease, peripheral artery disease, stroke/TIA history, and congestive heart failure. Laboratory values abstracted were the peri-procedural race based GFR. The peri-procedural medication administration record for each patient was abstracted from the registry and compared with the antiplatelet medications aspirin, clopidogrel, ticagrelor, prasugrel, and dipyridamole. During the pre-procedure history and physical, the duration of held oral anticoagulant doses was documented and collected in the registry.
Data review and collected was performed by a physician trained to abstract the needed data into SharePoint. Heparin doses and administration times were obtained by the medical record by review of the anesthesia procedure log. ACT values and result times were documented by the electrophysiology laboratory staff, and reviewed in the medical record. Left ventricular ejection fraction was abstracted from the electronic medical record after review of the most recent echocardiogram. All occurrences of major bleeding or thrombotic events were reviewed and adjudicated by a Board Certified Cardiologist.