Key result
PEEP does not affect diastolic relaxation or passive filling but shows slight positive inotropic effects.
Why the study?
Echocardiographic parameters of diastolic function depend on cardiac loading conditions altered by positive pressure ventilation, but the direct effects of positive end-expiratory pressure (PEEP) on cardiac diastolic function are unknown.
Does positive end-expiratory pressure (PEEP) alter intrinsic cardiac diastolic function and echocardiographic filling parameters in adult patients?
Design
Comparative echocardiography-conductance catheter study with randomized order
Authors
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Diastolic echo changes with PEEP reflect loading conditions, not intrinsic function; leaves open clinical relevance of slight inotropy and warrants cautious interpretation in ventilated patients.
RCT
randomized order
Does positive end-expiratory pressure (PEEP) alter intrinsic cardiac diastolic function and echocardiographic filling parameters in adult patients?
p-value: p=0.002
PEEP alters echocardiographic parameters of diastolic function by changing loading conditions rather than intrinsic diastolic properties, highlighting the need for caution when interpreting these parameters in mechanically ventilated patients.
Berger et al. (2022) reported an RCT. Positive end-expiratory pressure (PEEP) vs. 0 PEEP was evaluated on active diastolic relaxation or passive ventricular filling properties (p=0.002). Positive end-expiratory pressure (PEEP) does not affect active diastolic relaxation or passive ventricular filling properties, but may have slight positive inotropic effects (p=0.002).
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