Sample frequencies of various signals in MIMIC-IV Waveform Database v0.1.0

[fwhiemstra]

In MIMIC-IV Waveform Database v0.1.0, signals can have different sample frequencies, specified by multiplication of the number of samps per frame (samps_per_frame in record_data = wfdb.rdrecord(record_name, pn_dir=record_dir) with the base sample frequency (fs in record_data). However, in p_signal in record_data, all the columns (signals) have the same length. How should I interprete this? Are the columns still time-aligned, i.e. each row has the same time stamp, despite having different sample frequencies?