Simultaneous capture and display of electrocardiogram and multi-site phonocardiogram

This document presents a method for coupling and recording of signals from an electrocardiogram (ECG) and three electronic stethoscopes, as well as for the synchronized graphic display of the ECG and phonocardiogram (PCG) signals. This tool presents a visualization interface that assists teaching of the cardiac cycle and can be of support in non-invasive diagnosis of the heart. Low cost ECG and EE devices were used; their output signal were digitized simultaneously to process and correlate the information in a personal computer (PC). Several sites for auscultation of sounds are explored and the graphical interface developed allows investigation of the relationships between the ECG and multi-PCG. The software system that involves the signal processing and the graphical interface allows the quantitative measurement of clinical aspects, in addition to qualitative analysis.