The timing of your heart attack could be an important factor in whether you live or die.
In a new review of research, the Mayo Clinic analyzed the results of 48 studies involving 1.9 million patients to assess the effects of ``off-hour'' heart attacks.
The chances of dying are five per cent higher for heart attack patients who arrive at the hospital at night or on a weekend, compared with those who arrive during regular hours.
The studies were carried out in the U-S, Canada and Europe.
Heart attacks remain the leading cause of death worldwide.