Dr. Bryan Smith, cardiologist at the University of Chicago Medical Center, joins Lisa Dent to discuss what might have caused Buffalo Bills safety Damar Hamlin to suffer cardiac arrest after a tackle on the field. Dr. Smith also explain what commotio cordis is and whether that may be what Hamlin experienced.
Follow @LisaDentSpeaks
Follow @SteveBertrand Follow @kpowell720 Follow @maryvandeveldeFollow @LaurenLapka
