A Matlab/Octave function get_coupled_QRTwaves for finding the coupled ECG waves annotated using WFDB toolbox of PhysioNet. Besides the coupled wave outcome, the function accounts for the contiguous regions of the coupled annotated waves, giving the interruption locations and sizes of the interruptions.

The example code is demonstrated in example_QT_DB.m where the coupled waves are found using the annotations of the PhysioNet QT Database.

Currently the main application of the function is the mutual QT-RR interval dynamics of the heart.