Association of Preoperative Pulse Pressure and Oxygen Delivery Index During Cardiopulmonary Bypass With Postoperative Acute Kidney Injury.

Objective: To investigate if oxygen delivery index during cardiopulmonary bypass (DOI) was more strongly associated with acute kidney injury (AKI), the higher the patient's preoperative pulse pressure (PP).

Design: Retrospective cohort of 1064 patients undergoing cardiac surgery.

Setting: Single academic healthcare center.

Heart Rate Variability Biofeedback Improves Emotional and Physical Health and Performance: A Systematic Review and Meta Analysis.

We performed a systematic and meta analytic review of heart rate variability biofeedback (HRVB) for various symptoms and human functioning. We analyzed all problems addressed by HRVB and all outcome measures in all studies, whether or not relevant to the studied population, among randomly controlled studies. Targets included various biological and psychological problems and issues with athletic, cognitive, and artistic performance.