East Midlands Ambulance Service resuscitated 221 cardiac arrest patients in 11 months, new statistics show today.
That was just under 17 per cent of patients between April 2011 and February 2012 for what is a notoriously difficult type of emergency for paramedics to turn around.
EMAS, the ambulance service that covers Northamptonshire, responded to 1,310 cardiac arrest in that time.
However, the Department of Health data has been ranked by GMB, the union for ambulance staff.
EMAS has the second-lowest percentage of successful resuscitations in England. London Ambulance Services had the highest percentage with 29 per cent.
Cardiac arrests happen when the normal flow of blood around the body is stopped by a heart problem. It is different from a heart attack, when heart cells start do die through lack of blood.
Return of Spontaneous Circulation (ROSC) is one of new measures replaced the 18-minute target to get to non-life threatening 999 calls.
The measures indicate the overall effectiveness of the urgent and emergency care system in managing care for all out-of-hospital cardiac arrests. Figures include 999 calls where the arrest was not witnessed and the patient may have gone into arrest several hours ago.