Angiotensin receptor blockers (ARBs) are widely used by patients with heart disease or hypertension but little is known about how to manage these drugs perioperatively. To investigate this, US researchers performed a retrospective study of 30,173 patients in the Veterans Affairs Healthcare system admitted for noncardiac surgery between 1999 and 2011, published in Anesthesiology
on 30 May 2015.
Although all patients were taking ARBs before surgery, there was variation in when the drugs were resumed postoperatively, from the day of surgery to never. Two-thirds of patients had restarted ARBs by day 2 and 80% by day 30. In a multivariate analysis, 30-day mortality was significantly higher in patients who had not restarted ARBs by day 2 compared with those who had (adjusted hazard ratio 1.74); the risk was even higher in younger patients (<60 years).
 Lee SM, Takemoto S & Wallace AW. Association between withholding angiotensin receptor blockers in the early postoperative period and 30-day mortality: a cohort study of the Veterans Affairs Healthcare system. Anesthesiology 2015. doi:10.1097/ALN.0000000000000739.