By Maggie Fox @ CNN.com, May 27, 10:54 pm

Careful autopsies of 10 African-American victims of coronavirus show their lungs were clogged with blood clots, researchers reported Wednesday.

All 10 patients had underlying conditions that have been shown to worsen infection, including high blood pressure, diabetes and obesity. But genetic factors could also be at play, the team at LSU Health New Orleans School of Medicine said.

The findings, published in the Lancet Respiratory Medicine, may help explain why blacks are suffering so much more from Covid-19 in the US and in some other countries such as Britain, the researchers said.

"We found that the small vessels and capillaries in the lungs were obstructed by blood clots and associated hemorrhage that significantly contributed to decompensation and death in these patients," Dr. Richard Vander Heide, head of pathology at the medical school, said in a statement.

They also found blood markers called D-dimers, which are signs the body has been working to break down blood clots.

"I think obesity is important in our population," Vander Heide told CNN [....]