P. Lorimier

Cyclic haemodynamic and arterial blood gas changes during Cheyne-Stokes breathing

A 74-year-old patient presented with congestive heart failure and continuous periodic breathing. Left ventricular ejection fraction was 20% and the lung-to-brain circulation time was prolonged to 35 s. We report on the phasic changes of the patients arterial blood gas tensions and on the periodic fluctuations of pulmonary artery pressures and cardiac output that we observed during Swan-Ganz catheterisation.

Interet Du Suivi Des Bruits Respiratoires Tracheaux Dans Le Diagnostic De Dysrythmies Respiratoires Nocturnes

SummaryTwenty-six patients underwent a polysomnygraphic study allowing sleep staging and respiratory events scoring with the use of the oronasal flow, abdominal, thoracic and total displacement (Respitracet), and ear oxymetry. Moreover the patients were also equipped with a tracheal microphone giving a power rectified enveloppe (sonospirogram).Eleven patients showed abnormal respiratory events that were scored by visual lecture using all respiratory Parameters (excluding the sonospirogram) and were classified as obstructive central and mixed apneas-hypopneas. Periodic breathing was also appreciated. Detection of the same events was tried with the sonospirogram alone.The sonospirogram could accurately detect snoring and periodic breathing and finally central obstructive mixed apnea (the apneic index being well correlated: P<0.0()1 as well as the mean apnea duration: p < 0.005).In contrast hypopneic events related to snoring could not be accurately appreciated.We conclude that a sonospirogram may be useful ...