A paedophile died 10 days into a 36-year prison sentence after collapsing in his cell.
Harry Wood, 59, committed a string of horrific sexual assaults against children as young as two-years-old.
He was jailed up on last year for 38 offences that were committed when he was aged between 11 and 40 years old.
He was found by guards at HMP Leeds, Wakefield Coroners Court heard.
The inmate was rushed to hospital via ambulance but died at 10pm that night from heart failure due to heart disease, the court heard.