Care of critically ill patient, requires spontaneous & accurate decisions so that lifesaving therapy is properly applied. Statistics reveal that every minute a human is losing his life across the globe. In India, everyday many lives are affected by heart attacks and more importantly because the patients didn’t get timely and proper help. This paper is based on monitoring of patients. We have thought of a reliable, energy efficient patient monitoring system. It is able to send parameters of patient in real time. It enables the doctors to monitor patient's health parameters (temp, heartbeat, ECG) in real time. Here these parameters of patient are measured continuously and wirelessly transmitted using Zigbee. In the current proposed system the patient health is continuously monitored and the acquired data is analyzed at a centralized ARDUINO. If a particular patient's health parameter falls below the threshold value, an automated SMS is sent to the pre-configured Doctor's mobile using a standard GSM module interfaced to the ARDUINO. Here, we are using Zigbee for wireless transmission. The Doctor can get a record of a particular patient's information by just accessing the database of the patient on his PC which is continuously updated through Zigbee receiver module.