Poor guideline adherence in a real-world evaluation of hypertensive emergency management.

Abstract

The American College of Cardiology and American Heart Association define hypertensive emergency (HTN-E) as a systolic blood pressure greater than 180mmHg or a diastolic blood pressure greater than 120mmHg with evidence of end-organ damage (EOD). Based on expert opinion, current guidelines recommend antihypertensive therapy to reduce blood pressure (BP) at specific hourly rates to reduce progression of EOD, outlined by four criteria. Our goal was to describe compliance with guideline recommendations for early management of HTN-E and to analyze safety outcomes related to pharmacologic intervention. This was a retrospective chart review including patients presenting to the emergency department with HTN-E between September 2016 and August 2020. We excluded patients with a compelling indication for altered therapeutic goals (e.g. acute aortic dissection, hemorrhagic or ischemic stroke, and pheochromocytoma). The primary outcome was complete adherence with guideline recommendations in the first 24h. Of 758 screened records, 402 were included. Mean age was 54years and majority Black race (72%). Overall, total adherence was poor (<1%): 30% received intravenous therapy within 1h, 64% achieved 1-h BP goals, 44% achieved 6-h goals, and 9% had appropriate 24-h maintenance BP. Hypotensive events (N=67) were common and antihypertensive-associated EOD (N=21) did occur. Predictors of hypotension include treatment within 1h and management with continuous infusion medication. Current practice is poorly compliant with guideline criteria and there are risks associated with recommended treatments. Our results favor relaxing the expert opinion-based recommendations.