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.