ParquetAnnotations

open source
C++
Qt
medical data
A native desktop application for visualising ECG and pulse data with annotation markers from Parquet files.
Published

August 4, 2026

ParquetAnnotations is an interactive Linux desktop application for inspecting ECG and pulse signals stored in Apache Parquet files. It overlays the ECG waveform, pulse signal, and target annotations in a single responsive plot.

Features

  • Interactive zooming, panning, and coordinate inspection
  • Clear overlays for ECG, pulse, and target annotation data
  • Smooth handling of datasets with up to 350,000 entries
  • Sequential loading and inspection of Parquet files

Technology

The application is written in C++ and uses Qt 6, Apache Arrow, Parquet C++, and QCustomPlot. It is built with CMake and distributed under the GNU General Public License v3.0.

View the source code