A network of stroke specialists is on call to patients admitted to a Suffolk hospital via new computer technology.
Staff at Ipswich Hospital can link 24/7 with stroke doctors on call or based at hospitals across the east of England.
Patients who have a stroke out of normal working hours can be assessed by on-call doctors via the computer link.
Hospital teams can then administer a clot-busting thrombolysis drug if they are one of the 10% of stroke patients for which it is suitable.
Previously, Ipswich Hospital could only provide thrombolysis from Monday to Friday, from 0900 to 1700 BST.
On-call doctors, wherever they are in the region, can view brain scans on computer.
A monitor and camera link enables them to see and talk to hospital patients and staff from wherever they are in the region.
Brian Owens, associate director, said: "This new service will save lives and prevent disabilities by making sure that everyone who suffers a stroke has the best possible treatment, 24/7, 365 days a year."
The new tele-medicine partnership means patients may initially be taken by ambulance to a hospital which is not their most local.
However, if on-going care or rehabilitation is required, this will take place at the local hospital.
Ipswich Hospital has recently invested £500,000 in extra beds and staff to further improve care for stroke patients.