A system and a related methodology for gathering, during a selected time span, and from a common anatomical site, time-contemporaneous ECG-electrical and heart-sound signals including (1) processing such signals to effect (a) time-based, related ECG fiducials, and (b) systolic and diastolic heart-sound indicators, and (2) creating a reportable data stream which communicates such effected fiducials and indicators in a manner whereby time-based relationships between them, and non-time-based differentiation between systolic and diastolic heart-sound indicators, are made visually discernible. The methodology of the invention may also be implemented strictly for the gathering and processing of heart sounds.