Term café coronary was coined by
Cafe coronary was coined by Dr Roger Haugen, Medical examiner of Broward, Florida for impaction of food in the respiratory passage.
The original series of deaths involved well-nourished businessmen dying suddenly & unexpectedly in restaurants & cafes while sitting or shortly after sitting in a chair as if they died of heart attack. 
Hence, the name 'cafe coronary'. However, the autopsy reveals a bolus of food in the pharynx or larynx.
J Morton
Roger Haugen
Neil Markson
M. Hoppefiel