Abstract: According to an aspect of the present disclosure, a hand held device is providing twelve lead ECG signals using fewer number of probes/electrodes comprising, a first electrode to sense electrical RH signal, a second electrode to sense electrical LH signal, a third electrode to sense electrical LL signal, a fourth electrode to sense electrical V1 through V6 signal in a sequence, a first electronic circuit operative generate a lead I, lead II and lead III ECG signal, a second electronic circuit to generate a CT signal from the lead I, lead II and lead III signal and a third electronic circuit operative to generate V1-V6 lead ECG signals from the electrical V1 through V6 signal and the CT signal.

Abstract: A wearable device comprising a display dial configured to display various health parameters, a wristband assisting the device to wear on wrist, an eject-able tray comprising a micro-chip, a first spring coupled to the eject-able tray, at least one latch provided with a second spring to hold the eject-able tray within the device by compressing the first spring, and a health monitoring unit provided with multiple sensors to determine various health parameters, wherein compression of the second spring results in the latch to release the eject-able tray which in turn relaxes the compressed first spring to eject the micro-chip outside the device for collecting blood samples. The microchip comprises at least one micro-needle and an enzyme test strip for collecting and analyzing the blood samples. The health monitoring unit comprises at least three conductive sense pads which are collectively operable to provide electrocardiograph (ECG) information.