Cardiac arrest is a sudden stop in effective blood flow due to the failure of the heart to contract effectively. Symptoms include loss of consciousness and abnormal or absent breathing. Some people may have chest pain, shortness of breath, or nausea before this occurs.
Hayman Great Barrier Reef. Australasiaâs most exclusive private island resort â the five-star Hayman Great Barrier Reef, situated just offshore from Queensland, Australia â is poised to reopen next month following temporary closure for property restoration.
The  Great Barrier Reef off the coast of Queensland, Australia, is the  largest coral reef in the world, almost 2000km long, with its coral  cays and islands spreading overâ¦ 300,000 square kilometres.  Considered one of the wonders of the natural world, the Reef is  unique for being visible from Earth's orbit.