Comparable sensitivity for two methods of detecting patent foramen ovale in cryptogenic stroke


  • Contrast transthoracic echocardiography (cTTE) and contrast transcranial Doppler (cTCD) have comparable sensitivities for detecting patent foramen ovale (PFO) in people with cryptogenic stroke.

Why this matters

  • Both cTTE and cTCD can be used to filter preliminary cases of PFO, and there may be scope for using these methods as part of assessment of cryptogenic stroke risk.