A clubber who punched a bouncer who had escorted him outside has been cleared of manslaughter over his death.
James Darrah, 54, slumped against a wall near the Stone House club in Hertford and died after being hit by William Wade on 23 August 2014.
Wade, 27, of High Cross near Ware, had denied manslaughter. A jury acquitted him of the charge, but found him guilty of causing actual bodily harm.
He was bailed at St Albans Crown Court for sentencing next month.
The trial heard Wade had become loud and angry after being led from Stone House and threw a punch at Mr Darrah.
Prosecutor Michael Speak said: "Mr Darrah suffered from a heart condition and, as a result of being punched by the defendant, Mr Darrah died very shortly afterwards."
Mr Darrah, a door supervisor for a number of years, was doing his first shift at the Stone House club on the night he died.
He had been "calm and polite" in his dealings with a woman at the club who had had too much to drink when Wade intervened "for no good reason" and was asked to step outside.
Wade was under the influence of alcohol and ecstasy and had taken cocaine the previous night.
His defence argued Mr Darrah's heart condition, which caused him to be admitted to hospital in January 2014, meant he should not have been doing such a stressful job as a bouncer.
Judge Andrew Bright QC told Wade: "This matter crosses the custody threshold by some way."