Persistent central chest pain - often described as vice-like or a heavy crushing pressurePain spreading (radiating) to the jaw, neck and down one or both armsBreathlessnessDiscomfort high in the abdomen, similar to indigestionPossible collapse without warningAshen skin and blueness at the lipsRapid, weak pulse which may be irregularProfuse sweating, skin cold to the touchGasping for air (air hunger)Nausea and/or vomiting