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.
   Great: The Great Barrier Reef is a large and vast coral reef: at  2000km long, it is the largest coral reef in the world.   Barrier: The Great Barrier Reef is a barrier reef. A barrier reef  is one which runs parallel to the shore, separated by a channel of  water.  Reef: The Great Barrier Reef is a coral reef. Barrier: The Great Barrier Reef is a barrier reef. A barrier reef  is one which runs parallel to the shore, separated by a channel of  water.   Reef: The Great Barrier Reef is a coral reef.