You need to download healthy person ECG data file and first degree AV block data file from physio.net. You need to find P-R interval from that ECG signals. And if PR interval is longer (greater) than 0.20 seconds (200 msec), it is called person has first degree AV block disease. The PR interval is distance between P peak and Q peak of ECG signal so you need to find P and Q peaks of ECG signal using Wavelet Transform. Normally, this interval should be between 120 and 200 msec in the adult population. You need to design neural network which will classify healthy person data and person having First degree AV block data and give error graphs and Confusion Matrix.
Dear client I am a master of matlab and I am interested in your project. I will do my best to fulfill your request. We can talk more about project details and budget on chat. Best wishes