Combat casualties undergoing lifesaving interventions have decreased heart rate complexity at multiple time scales

Combat casualties undergoing lifesaving interventions have decreased heart rate complexity at multiple time scales.

PURPOSE We found that heart rate (HR) complexity metrics such as sample entropy (SampEn) identified patients with trauma receiving lifesaving interventions (LSIs). We now aimed (1) to test a multiscale entropy (MSE) index, (2) to compare it to single-scale measures including SampEn, and (3) to assess different parameter values for calculation of SampEn and MSE. METHODS This was a study of com...

Heart-rate complexity for prediction of prehospital lifesaving interventions in trauma patients.

BACKGROUND Traditional vital signs often fail to identify critically injured patients soon enough to permit timely intervention. To improve our ability to forecast the need for prehospital lifesaving interventions (LSIs), we applied heart-rate complexity (HRC) analysis to the electrocardiogram (ECG) of patients en route to trauma centers. METHODS Analysis of ECG and clinical data from 374 pat...

MDL-Based Analysis of Time Series at Multiple Time-Scales

The behavior of many complex physical systems is affected by a variety of phenomena occurring at different temporal scales. Time series data produced by measuring properties of such systems often mirrors this fact by appearing as a composition of signals across different time scales. When the final goal of the analysis is to model the individual phenomena affecting a system, it is crucial to be...

Transfusion-associated microchimerism in combat casualties.

BACKGROUND Fresh whole blood (FrWB) is routinely used in the resuscitation of combat casualties in Operation Iraqi Freedom and Operation Enduring Freedom. However, studies have shown high rates (20%-40%) of transfusion-associated microchimerism (TA-MC) in civilian trauma patients receiving allogenic red blood cell (RBC) transfusions. We explored the incidence of TA-MC in combat casualties recei...

Mass casualties in combat: lessons learned.