Transcranial Doppler Screening for Patent Foramen Ovale Closure in Cryptogenic Strokes in Young: A Single Center Experience from South India.

Background: Cryptogenic strokes are common in young adults. Patent foramen ovale (PFO) is an important cause of cryptogenic ischemic strokes. Transcranial Doppler (TCD) with bubble contrast is a noninvasive bedside tool in screening for PFO and other right to left shunt (R-L shunt).