Does prolonged QTc affect short-term and long-term outcomes in patients with normal left ventricular function undergoing cardiac surgery?
In patients undergoing cardiac surgery and a preoperative LVEF greater than 40%, a prolonged QTc interval is associated with increased short-term and long-term mortality and increased perioperative morbidity, and therefore should be considered when assessing risk preoperatively.
The MDRD equation is superior to cystatin C-based equations for estimating GFR in former kidney donors. Creatinine measurement is cheaper and the MDRD GFR is given out by most laboratories and therefore it should be the preferred model in this population.