Diurnal variation of pulmonary artery pressure in ambulatory heart failure patients.

The described diurnal changes in PAP should be considered when managing ambulatory HF patients based on these readings. PADP can be used reliably without concern for the time of day the readings were recorded.HighlightsThere is a diurnal variation in PAP in ambulatory heart failure patientsPulmonary artery systolic and mean pulmonary artery pressures are higher at night-time than in morning.Pulmonary artery diastolic pressures do not vary significantly with time of day.These findings should inform clinical decisions in management of these patients about the time of the day readings are taken.