Heart Foundation The Heart Foundation is sounding the alarm over research suggesting many heart attack patients don’t call an ambulance because they’re unsure of the warning signs or assume they’re not at risk. Acting quickly and calling an ambulance is critical to minimise heart damage, but just one in three patients called triple zero (000) – regardless of whether it was their first heart attack or not. Far more people (49%) drove themselves to the nearest hospital or GP clinic, the Foundation’s new survey of more than 400 heart attack survivors reveals. The results have prompted the heart health charity to implore more Australians to learn the warning signs and know to get help fast by calling triple zero.