Automatic comparison of routinely collected EHR data with trial eligibility criteria can speed up patient recruitment. The present work aims to analyze to what extent the Austrian nation-wide EHR system ELGA could support this task. Using the open source tool ART-DECOR we tried to map a reference list of 150 common eligibility criteria specified in the EHR4CR project to the HL7 CDA templates that describe the structure of ELGA document types. For 61% of the criteria mappings could be made to ELGA template elements holding structured data. Comparing our results with similar work, we conclude that ELGA could be a useful component for the automatic identification of trial patients.