Prehospital ECG in suspected CVA detected STEMI in 5.0% of 259 patients studied. Furthermore, in 18 cases new onset A-fib with direct clinical consequences was discovered on prehospital ECG. Cardiogram acquisition should be considered part of routine prehospital care for suspected CVA.

https://www.ncbi.nlm.nih.gov/pubmed/?term=bobinger+AND+diagnostic+value+of+prehospital+ecg