find_abp_beats: Create DataFrame of arterial pressure waveform annotations.

In JohannesNE/waveformtools: Tools for waveform analysis in my PhD project

Create DataFrame of arterial pressure waveform annotations.

Description

Position and value of systolic and diastolic pressures. Each row represents one beat with first a diastolic and then a systolic value.

Usage

find_abp_beats(
  data,
  abp_col = 2,
  time_col = 1,
  min_PP = 0.2,
  min_beat_width_s = 0.3,
  win_size_avg = 2000,
  min_cross_to_diastole = NULL,
  show.plot = FALSE,
  include_waveform = FALSE,
  sample_rate = NULL
)

Arguments

data	Vector of arterial blood pressure.
abp_col	Index or name of column with abp data
time_col	Vector with the same length as abp, used to indicate the timing of each sample. If this variable is provided, sample indexes will be substituted for this vector.
min_beat_width_s	Minimum beat width (in seconds) The default is 0.3 seconds
win_size_avg	Window size for moving avg calculation. This is used to calculate the cutoff value for when a peak represents a new beat and not just noise. Lower values increase flexibility. Use visualize_abp_peak_detection() to dial in.
min_cross_to_diastole	Minimum time (seconds) from the threshold crossing (downstroke) to the diastole. Can be used to avoid detecting a low dicrotic notch as a diastole.
show.plot	Show diagnostic plot
include_waveform	Include waveform for each beat in output
sample_rate	Used if data is a vector of samples.

Details

.noise_pos_after_sys is the sum of positive changes in ABP excluding the systole and the dicrotic notch, divided by the beat length in seconds. 2 mmhg/s seems like a good cutoff.

JohannesNE/waveformtools documentation built on July 1, 2022, 8:48 p.m.