"The Unsinkable Molly Brown" -- a search and rescue dog better known as just "Molly" -- has lived up to her name, surviving an operation in Missouri that saw a pacemaker installed in her heart.

After years of helping authorities look for murder victims and survivors of natural disasters, Molly, a 5-year-old chocolate Lab, became lethargic last month. Veterinarians believe she had a heart attack.

On Tuesday night, after noticing her heart rate had dropped, her owners, Allen and Alicia Brown of Saginaw, rushed her to Columbia.

After the Joplin Globe reported on the story, the Browns were overwhelmed with offers to help pay for the $2,500 surgery, follow up visits and travel costs. A medical technology company, Medtronic, Inc., donated the device, and an anonymous Kansas businessman offered to kick in $2,000.

Molly was scheduled to return home today, where she will be confined to her crate for two weeks. She should be able to return to full-time rescue work, Allen Brown said. Allen, a paramedic, and Alicia, a nurse, work with the all-volunteer Newton County K-9 search-and-rescue unit.