Diurnal variation of pulmonary artery pressure in chronic heart failure.
Key result
Nocturnal pulmonary artery pressure increased by a mean of 5.1 mm Hg systolic from daytime, and standing to lying increased it by 9.3 mm Hg systolic, showing posture alone does not determine it.
Why the study?
Does pulmonary artery pressure exhibit diurnal variation in patients with chronic heart failure?
Population
8 angina-free men (aged 50-72 years) with treated chronic heart failure caused by ischaemic heart disease
Design
Case_series
Authors
Discussion
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Member takes
Implication
May require accounting for diurnal PAP variation in HF measurements; case report leaves open confirmation in larger studies.
Study Design
Type
Observational (n=8)
Structured PICO
Does pulmonary artery pressure exhibit diurnal variation in patients with chronic heart failure?
P
Population
8 angina-free men aged 50-72 years with treated chronic heart failure caused by ischaemic heart disease.
E
Exposure
Continuous ambulatory pulmonary artery pressure recording by a transducer tipped catheter
O
Outcome
Diurnal variation in pulmonary artery pressure (day vs night, standing vs lying)surrogate
Pulmonary artery pressure exhibits significant diurnal and postural variation in patients with chronic heart failure, which must be accounted for when interpreting isolated measurements.
Cite This Study
Gibbs et al. (1989) conducted an observational in chronic heart failure (n=8). Diurnal variation and postural change vs. Daytime and standing positions was evaluated on Change in pulmonary artery pressure. Nocturnal pulmonary artery pressure increased by a mean of 5.1 mm Hg systolic from daytime, and standing to lying increased it by 9.3 mm Hg systolic, showing posture alone does not determine it.