A new study conducted on more than 1,255 men and women patients with high blood pressure, aged between 33 to 97-years, with 70 as the average age; suggests that subjects who did not get the standard 7.5-hours of sleep and, witnessed elevated levels of blood pressure on falling asleep, were four times as likely to suffer a stroke, fatal or non-fatal heart attack or die suddenly of cardiac arrest. They had a 68% higher risk of any one of these cardiovascular complications, compared to their better-rested counterparts.