Health Chiefs in Shropshire have expressed concern at the continued under-performance of the ambulance service in reaching urgent cases.
Latest figures show that between April and November last year, the service failed to meet any of its response time targets for such incidents.
The target is to reach three quarters of patients within eight minutes.
The ambulance service described the figures as "disappointing", but said the situation had improved.
Ambulance service spokesman Murray McGregor said that since November it had been improving performance through "extra staff, better use of crews and smarter working".
Shropshire Primary Care Trust is in talks with the ambulance service over lifting performance and has provided an extra £600,000 for developing systems to achieve this.
In contrast, for less serious emergencies, the ambulance service exceeded the target of reaching 95% of patients within 19 minutes, in every month of the financial year so far.