Many patients who have a sudden cardiac arrest, may have missed warning symptoms such as chest pain and breathlessness, which could have potentially improved their survival chances. Almost half of the time, patients may experience warning signs four weeks ahead and repeated symptoms 24 hours before their heart abruptly stops beating. In the past, it was thought that sudden cardiac arrest is an unexpected event, with almost no time to intervene. However, this new study has revealed that those who managed to seek help by calling for an ambulance, increased their survival rate by 32%. It was also found that older patients and those with a history of heart disease were more likely to call for help.