What This Means
This research examined how often patients seen in an emergency department (ED) had high blood pressure readings and whether those patients had ever been formally diagnosed with hypertension. Looking at over 66,000 discharged patient visits at a large academic hospital in 2024, the researchers found that nearly 79% of patients had at least one elevated blood pressure reading, and about 58% had readings in the range considered Stage 2 hypertension (140/90 mmHg or higher). Strikingly, more than half of the patients with these higher-range readings had no documented hypertension diagnosis in their records.
The study also found that certain groups were more likely to have a formal hypertension diagnosis: older patients, women, Black patients, those who did not need an interpreter, and those covered by Medicare or Medicaid. This suggests that some populations — such as younger patients, non-English speakers, or those without certain types of insurance — may be less likely to have hypertension formally recognized and recorded, even when their blood pressure is elevated.
This research suggests that emergency departments, while primarily focused on acute care, may represent an underutilized opportunity to identify people with unrecognized high blood pressure and connect them with follow-up care. Since many patients had only a single blood pressure measurement recorded during their visit, the findings also highlight the need for repeat measurements and structured pathways to refer patients with elevated readings to primary care providers for proper evaluation and management.