Heart rate response to held lung volume

Abstract

It has been shown that respiratory sinus arrhythmia correlates fundamentally with lung volume changes. The correlation with thoracic circumference changes is incidental and quantitatively unreliable. Extensive measurements on one subject and limited measurements on four other subjects demonstrate the existence of a systematic relationship between heart rate and lung volume under reasonably static conditions, a high heart rate corresponding to the expiratory position and a low heart rate to the inspiratory position. This relation has been described successfully with an exponential equation. heart rate and lung volume: exponential relation; heart rate: lung volume dependence; lung volume and thoracic circumference: calibration; respiration and heart rate: static lung volume effect; respiratory sinus arrhythmia: held lung volume and heart rate; sinus arrhythmia: static lung volume dependence; thoracic circumference and lung volume: calibration Submitted on July 22, 1964

Influence of Controlled Breathing with Diminished Tidal Volume on Hypoxic Heart Rate Response in Man

“…A few other factors have been reported to affect HR during different respiratory activities, such as positive and negative intrathoracic pressure [Hong et al, 1969] and the magnitude of the lung volume [Angelone and Coulter, 1965]. However, these influences may not substantially contribute to the present results.…”

Respiration

“…The right heart.-Angelone & Coulter (80) found that heart rate in creased in static expiration and decreased in static inspiration. However, Murphy (81) found that at higher respiratory frequencies ( > 10 breaths per min ) heart rate rose throughout inspiration and fell throughout expira tion ; at lower respiratory frequencies the phase relationship changed, so that the peak for heart rate occurred earlier in inspiration and the nadir earlier in expiration.…”

Computers in behavioral science: Automatic computation of evoked heart-rate and pulse-volume responses to verbal stimuli

“…Such averaged responses were relatively free from contamination by internal stimuli not timelocked to the triggering stimulus, such as respiration-induced heart-rate changes (Angelone and Coulter, 1965), which were properly rejected as noise in the Lang procedure.The averages prepared by Lang were calculated by hand from the original paper tracings of the EKG, and were defined on a beat-by-beat horizontal axis, vertical deflection being determined by the average change in duration of the intervals between successive pairs of post-stimulus beats. These evoked responses were automatically computed and plotted off-line, calibrated in standard deviations on one axis and time on the other.…”

“…Such averaged responses were relatively free from contamination by internal stimuli not timelocked to the triggering stimulus, such as respiration-induced heart-rate changes (Angelone and Coulter, 1965), which were properly rejected as noise in the Lang procedure. Several investigators have proposed a type of data reduction analogous to the stimulus-triggered averaging procedures familiar to electrophysiologists.…”

“…In inter-subject average responses to identical verbal stimuli, several operational stress points of the sentence syntax could be determined. Such averaged responses were relatively free from contamination by internal stimuli not timelocked to the triggering stimulus, such as respiration-induced heart-rate changes (Angelone and Coulter, 1965), which were properly rejected as noise in the Lang procedure. HE description and quantification of T heart-rate and pulse-volume changes associated with controlled and replicable stimuli has presented a continuing problem to investigators of autonomic response characteristics.…”