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Blood pressure is frequently measured in hospitalised patients. Severe hypertension can result in a heart attack, stroke, or damage to blood vessels and organs such the heart, brain, kidneys, and eyes. The majority of hospitalised patients, on the other hand, have transiently elevated blood pressure without signs of organ damage, which is known as silent hypertension and is infrequently treated with blood pressure medications. However, there is little data to guide such treatment decisions.
In a retrospective cohort study, Beth Israel Deaconess Medical Centre (BIDMC) physician-researchers looked at the management of high blood pressure in almost 66,000 older persons who were hospitalised for non-cardiac reasons. The researchers discovered that having extensive antihypertensive therapy as an inpatient was associated with a higher risk of adverse events, especially for individuals taking the medicine intravenously rather than orally. The findings, published in JAMA Internal Medicine, do not support treating asymptomatic raised blood pressure in hospitalised older persons and emphasise the need for more research into best practises for inpatient blood pressure management. "While the benefits of lowering chronically elevated blood pressure in the outpatient setting are clearly defined and include reductions in mortality and cardiovascular events, better evidence is needed to inform clinical decision-making regarding inpatient blood pressure management," said corresponding author Timothy S. Anderson, MD, MAS, a clinical investigator in the Division of General Medicine at BIDMC. "In the hospital, blood pressure is often elevated due to pain, fever, anxiety, new medication and other hospital factors. It is not clear that treating transient elevations with blood pressure medications is helpful, it may instead result in overtreatment." Using clinical and pharmacy data from the national Veterans Health Administration (VHA), Anderson and colleagues compared outcomes of hospitalized patients with elevated blood pressure who received intensive blood pressure treatment in the first 48 hours after admission to those who did not. The primary outcome was a composite of adverse effects including inpatient mortality, acute kidney injury, cardiac injury, stroke, and transfer to the intensive care unit. The cohort included 66,140 older adults, primarily male, who were hospitalized for non-cardiac reasons and had elevated blood pressures in the first 48 hours of hospitalization. One in five patients (or more than 14,000 patients) received intensive treatment for blood pressure, defined as additional antihypertensive medications the patient had not been taking at home prior to hospitalization. Of this group, 18 percent (or more than 2,500 patients) received antihypertensive medication intravenously. Compared to hospitalized patients with elevated blood pressure who did not receive intensive treatment within the first 48 hours of hospitalization, patients who received antihypertensive medication were at greater risk for adverse clinical outcomes, including cardiac injury, acute kidney injury, and ICU transfer. Receiving antihypertensives intravenously further heightened the risk. "These findings suggest that the common practice of acutely treating asymptomatic inpatient blood pressure could be harmful and the use of intravenous antihypertensives in particular should be discouraged," said Anderson, who is also an assistant professor of medicine at Harvard Medical School. "Until we have more definitive randomized clinical trial data, our findings suggest that the safest path forward is likely to rethink the underlying reason for inpatient blood pressure measurement and reorient clinical practice. In combination, these findings suggest that pharmacologic treatment of asymptomatic elevated inpatient blood pressure should be the exception rather than the rule." (ANI)
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