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This paper presents a data adaptive technique of cardiovascular disease diagnosis by analyzing electrocardiogram (ECG) signals. The separation of high-frequency QRS and low frequency signal are performed by employing empirical mode decomposition (EMD). Biomedical signals like heart wave commonly change their statistical properties over time, tending to be nonstationary for which EMD is a powerful tool of decomposition. EMD is used to decompose ECG signal into a finite set of band-limited signals termed as intrinsic mode functions (IMFs). Then the low and high frequency components of ECG signals are obtained partial reconstruction intrinsic mode functions and the residual. The related signal processing tools are applied to extract high and low frequency parts to diagnosis the cardiovascular diseases.