But the cause or trigger is still unknown as per the Minnehaha medical coroner’s report.
Bernard Gutwa, the uncle of the late Griffins said parents and friends were still having more questions than answers.
He said they are still at pains to understand exactly what might have happened to their son.
A few close family members are expected to travel from Kenya to pay their last respects.
A Kenyan student in the US who passed away mysteriously aboard an American airline died of heart attack, initial findings have revealed.
A preliminary post-mortem report presented to the parents of Griffin Gutwa, a Minnesota college medical student who collapsed and died aboard Delta Flight from San Diego California to Minneapolis, indicates that he suffered from a heart condition known in medical terms as cardiomegaly or abnormally enlarged heart.
But the cause or trigger is still unknown as per the Minnehaha medical coroner’s report compiled by Dr Kenneth Snell, a coroner in Sioux Falls, South Dakota who conducted the post-mortem.
Speaking to Nation from Minneapolis, Minnesota, Bernard Gutwa, the uncle of the late Griffins said parents and friends were still having more questions than answers and are still at pains to understand exactly what might have happened to their son.
"The family is still calling for further investigations to conclusively establish the real cause or what triggered the abnormality of the heart, because as far as we know, Griffin Gutwa was a very active young man who does not drink or smoke and adheres to the Seventh-day Adventist’s strict tenets of a healthy lifestyle. In fact, before he joined the university he had been given a clean bill of health after undergoing rigorous medical and physical tests,” said Mr Bernard Gutwa.
The Kenyan community in the US was shocked by reports of the death of the 18-year-old Kenyan-born student who fell asleep on a plane and never woke up.
He was apparently on his way home for Christmas.
The former Burnsville High School student, the oldest of four children, was the first to attend college since the family moved to the US in 2004.
According to press reports, Mr Gutwa called his family on the morning of December 22, 2017 just before boarding a Delta Airlines flight from San Diego to Minneapolis.
“He had just finished his exams,” said his father, Gideon Gutwa.
“He was excited to come home.”
About an hour into the flight, Griffin asked for warm water.
He later leaned his head against the window and fell asleep, according to other passengers.
The passenger next to him became concerned when his breathing changed, and called for a flight attendant.
The attendant checked on him, realised something was wrong and asked for a medical professional to help.
Gutwa was not breathing and the pilot began looking for a place to make an emergency landing.
The nearest airport was in Sioux Falls, South Dakota.
But paramedics at the airport were unable to revive Gutwa, according to Sioux Falls Police Department.