Systems, methods, and computer program products are disclosed that may be used for photoplethysmogram data analysis and presentation. For example, photoplethysmogram (PPG) signal data is received as communicated by a PPG sensor of a wearable device worn by a user. A heartbeat interval may be determined from at least the PPG signal data. Also, an electrocardiogram (ECG)-type waveform spanning the heartbeat interval may be generated at a graphical interface.