Due to numerous uses of wireless sensor networks in various fields, they have attracted much interest in research community. For the monitoring and surveillance purposes wireless sensor networks are mostly used. In healthcare, WSNs are being popular due to its ease of use because patients can be monitored easily even at their homes by the doctors. A Break-The-Glass Access Control (BTG-AC) model was proposed with more flexible access to medical data in a reasonable time to provide data availability to the users. In the BTG-AC, security of the data never considered. For the security of the data an innovative security approach is desirable that also fit into WSNs. So, a new Secure Medical Record Access Control (SMRAC) Model is proposed. SMRAC is same as BTG-AC model but the main difference is to address the security issue. Parallelizing ciphertext policy attribute-based-encryption is implemented in SMRAC to improve the security of patient’s data. Simulation result shows the effectiveness of the SMRAC model. For the further evaluation, SMRAC model is compared with the existing BTG-AC model in terms of fault detection and execution time.