Improving inpatient venous thromboembolism prophylaxis.

Objectives: The number and types of inpatients given inadequate prophylaxis for venous thromboembolism (VTE) are not known; patients receive less than appropriate prophylaxis with some frequency.

Methods: Initially we evaluated VTE prophylaxis at a community hospital by comparing prophylaxis patterns in adult inpatients for whom some prophylaxis was indicated. Patients were categorized as medical, general surgery, and orthopedic, then categorized as "appropriate," "suboptimal," or "none" in terms of VTE prophylaxis.

Detection of cardiac variability in the isolated rat heart.

Cardiac variability can be assessed from two perspectives: beat-to-beat performance and continuous performance during the cardiac cycle. Linear analysis techniques assess cardiac variability by measuring the physical attributes of a signal, whereas nonlinear techniques evaluate signal dynamics. This study sought to determine if recurrence quantification analysis (RQA), a nonlinear technique, could detect pharmacologically induced autonomic changes in the continuous left ventricular pressure (LVP) and electrographic (EC) signals from an isolated rat heart-a model that theoretically contains no inherent variability.