Results 41 to 50 of about 5,075,819 (283)

The pitfall of pulse pressure variation in the cardiac dysfunction condition [PDF]

open access: yesCritical Care, 2015
We read with interest the recent articles in Critical Care about the limitations of pulse pressure variation (PPV) for predicting fluid responsiveness [1, 2]. We believe that cardiac dysfunction should be included in this list of PPV limitations. During right ventricular (RV) dysfunction, the inspiration would increase RV afterload and lead to a ...
He, Huai-wu, Liu, Da-wei
openaire   +2 more sources

Experimental study on pulse characteristics of negative corona discharge in SF6/N2 gas mixtures under DC voltages

open access: yesAIP Advances, 2020
Corona discharge, an inevitable phenomenon, may lead to insulation degradation, threatening the safe and reliable operation of gas-insulated power equipment. The pulse stage is a complex but usual discharge process in corona discharge.
Yanliang He   +5 more
doaj   +1 more source

Effect of tidal volume, sampling duration, and cardiac contractility on pulse pressure and stroke volume variation during positive-pressure ventilation.

open access: yes, 2008
Sampling duration, tidal volume, and beta-adrenergic blockade differentially alters pulse pressure variation and stroke volume variation during intermittent positive-pressure ventilation.
Pinsky, Michael R, Kim, Hyung Kook
core   +1 more source

Pulse pressure variation and systolic pressure variation in mechanically ventilated children

open access: yesPaediatrica Indonesiana, 2011
Background In mechanically ventilated patients, changes in breathing patterns may affect the preload, causing stroke volume fluctuation. Pulse pressure variation (PPV) and systolic pressure variation (SPV) are dynamic means of the hemodynamic monitoring in ventilated patients.
Johnny Nurman   +2 more
openaire   +2 more sources

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

Temporal and Bidirectional Association Between Blood Pressure Variability and Arterial Stiffness: Cross-Lagged Cohort Study

open access: yesJMIR Public Health and Surveillance, 2023
BackgroundThe causal relationship between blood pressure variability (BPV) and arterial stiffness remains debated. ObjectiveThis study aimed to explore the temporal and bidirectional associations between long-term BPV ...
Zhiyuan Wu   +6 more
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

open access: yesFEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Pulse pressure respiratory variation to predict fluid responsiveness: From an enthusiastic to a rational view

open access: yes, 2015
Comment on Arterial pulse pressure variation suitability in critical care: A French national survey. [Anaesth Crit Care Pain Med. 2015] Evaluation of the knowledge base of French intensivists and anaesthesiologists as concerns the interpretation of
LAKHAL, K.   +3 more
core   +1 more source

Pulse pressure analysis: to make a long story short. [PDF]

open access: yes, 2010
Pulse pressure analysis algorithms are commonly used to measure cardiac output and to allow for the rational titration of therapy in critically ill patients. The ability of these algorithms to accurately track changes in stroke volume (and cardiac output)
Maurizio Cecconi   +3 more
core   +1 more source

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