"We have no way of knowing how long she was down before she was discovered," the paramedic told MSNBC.
Seminole County Police Chief Charlie Tiger said emergency personnel received a "request for medical assistance" at 1:45 p.m. Hospital personnel pronounced Smith dead at 2:49 p.m.
"She did have some flu-like symptoms earlier," said one Ron Rale, Smith's attorney. "It's just shocking."
Smith, her husband Howard K. Stern, and several others -- including a nurse -- checked into the hotel Monday, Tiger said. Smith's 5-month-old daughter, Dannielynn Hope -- who is the subject of a paternity battle -- was not with them, sources said.
The others apparently had left to pick up a boat Smith and Stern had purchased, MSNBC said.