Isolated tricuspid valve incompetence resulting from blunt thoracic in
jury is rare. The diagnosis may be challenging. Subsequent clinical co
urse may be variable. Early surgical intervention rather than medical
therapy has been suggested in selected cases. We report a case of blun
t chest trauma causing delayed chronic tricuspid regurgitation manifes
ting primarily as atrial fibrillation many years after the initial blu
nt chest trauma. Replacement of tricuspid valve restored normal sinus
rhythm.