There are a few risks linked with watchman implantation, like with any procedure:

  • Accidental heart puncture
  • Air embolism
  • Allergic reaction
  • AV fistula
  • Bleeding or throat pain from TEE probe
  • Bruising at the catheter site
  • Clot formation on the Watchman closure device
  • Excessive bleeding
  • Pneumonia
  • Pneumothorax
  • Renal failure
  • Thrombosis and TIA ( Transient ischaemic attack )

Your risk is subject to your age, other health conditions, and other factors.