The primary objective of this study is to evaluate the safety and the Clostridioides difficile infection (CDI) recurrence rate in participants who receive a 14-day course of VE303 or matching placebo.
Other objective is to measure health-related quality of life and daily CDI symptoms in participants treated with VE303 versus placebo.

The purpose of this research is to gather information about the effectiveness and safety of Left Atrial Appendage Occlusion (LAAO) device procedures in patients using a Watchman device performed on days where doctors perform a large number of procedures.

The study primary outcome is to evaluate complications during the procedure up to 30 days after the procedure.

The final outcome is to determine successful placement within 31 - 90 days after implant.

This study will have a 1:1:1 randomization post the implantation of the WATCHMAN DLX Pro Device comparing three different medications used after the WATCHMAN FLX Pro Device is placed. The goal of this study is to see how safe and effective the medications are after the device is placed. The three different arms include the following: Aspirin only for 12-month study duration, reduce dose non-vitamin K antagonist (VKA) oral anticoagulant (NOAC), either commercially available apixaban (preferred) or rivaroxaban for first 3-months, followed by aspirin, or Aspirin +clopidogrel) for first 6 months followed by aspirin only.