Catheter ablation of atrial fibrillation : radiofrequency catheter ablation for redo procedures after cryoablation

Aim: To evaluate the effectiveness of two different strategies using radiofrequency catheter ablation for redo procedures after cryoablation of atrial fibrillation. Methods: Thirty patients (paroxysmal atrial fibrillation: 22 patients, persistent atrial fibrillation: 8 patients) had to undergo a redo procedure after initially successful circumferential pulmonary vein (PV) isolation with the cryoballoon technique (Arctic Front Balloon, CryoCath Technologies/Medtronic). The redo ablation procedures were performed using a segmental approach or a circumferential ablation strategy (CARTO; Biosense Webster) depending on the intra-procedural findings. After discharge, patients were scheduled for repeated visits at the arrhythmia clinic. A 7-day Holter monitoring was performed at 3, 12 and 24 mo after the ablation procedure. Results: During the redo procedure, a mean number of 2.9 re-conducting pulmonary veins (SD ± 1.0 PVs) were detected (using a circular mapping catheter). In 20 patients, a segmental approach was sufficient to eliminate the residual pulmonary vein conduction because there were only a few recovered pulmonary vein fibres. In the remaining 10 patients, a circumferential ablation strategy was used because of a complete recovery of the PV-LA conduction. All recovered pulmonary veins could be isolated successfully again. At 2-year follow-up, 73.3% of all patients were free from an arrhythmia recurrence (22/30). There were no major complications. Conclusion: In patients with an initial circumferential pulmonary vein isolation using the cryoballoon technique, a repeat ablation procedure can be performed safely and effectively using radiofrequency catheter ablation

October 23, 2020: Covid-19 Campus Update

The COVID-19 Response Team continues to work with the Genesee County Public Health Department and with the Of ice of the President to adapt to the situation as it evolves and provide our community with the most current information regarding the COVID-19 pandemic. The University is fully committed to the health and safety of its entire community, and will continue to closely monitor this situation and any others that impact our campus. In addition to providing updates on a regular basis, the team meets regularly to review, evaluate and address immediate and future issues related to the pandemic. Members of the team include student, faculty and staf representatives and are listed here on the University’s website

August 6, 2020: Covid-19 Campus Update

The COVID-19 Response Team continues to work with Genesee County Public Health Department and with the Office of the President to adapt to the situation as it evolves and to provide our community with the most current information regarding the COVID-19 pandemic. The University is fully committed to the health and safety of its entire community, and will continue to closely monitor this situation and any others that impact our campus

September 18, 2020: Campus Update 6

The COVID-19 Response Team and University leadership continue to closely monitor the local, state and national situation in consultation with health experts and in accordance with government guidelines. If conditions change, the University will alter plans to ensure the safety of the campus community. Fall Term 2020 classes begin on October 5. As the University’s COVID-19 Response Team continues to finalize details for the fall, please carefully review these updates

October 7, 2020: Covid-19 Campus Update

The COVID-19 Response Team continues to work with the Genesee County Public Health Department and with the Of ice of the President to adapt to the situation as it evolves and to provide our community with the most current information regarding the COVID-19 pandemic. The University is fully committed to the health and safety of its entire community, and will continue to closely monitor this situation and any others that impact our campus

February 10, 2021: Covid-19 Campus Update

In an ongoing effort to keep our campus safe, the University will implement new Randomized COVID-19 Sampling Testing for all students, faculty, and staff beginning February 1