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    Updated clinical guidelines for childhood hypertension

    New guidance for pediatric hypertension makes it easier for primary care physicians to identify children and adolescents with high blood pressure and manage them in an appropriate manner.

     

    Thanks to several seminal, longitudinal research studies, we know now that cardiovascular disease (CVD) begins in youth and tracks into adulthood.1-4 We also know that there are tools available to decrease CVD risk in childhood and beyond; key to this is early identification and treatment of modifiable CVD risk factors.

    Hypertension is one CVD risk factor that has garnered increased attention over the last several decades due to its increased prevalence among children and adolescents and known association with atherosclerosis and left ventricular hypertrophy.5 Despite this increased attention, recognition of elevated blood pressure (BP) and hypertension in children remains suboptimal and underdiagnosis remains a problem, despite the advent of electronic record alerts and technology.6,7

    The recent pediatric hypertension guidelines aim to make BP measurement and hypertension screening in children much easier.8 It provides clear instructions in text and via a publicly available online instructional video regarding how to properly measure BP via manual auscultation, a necessary step in the clinical diagnosis of hypertension. Whereas electronic health records have made it easier to recognize when a BP is elevated, these systems fail when an updated height is not simultaneously entered or when the BP is not entered into the health record in a timely fashion.

    To aid providers in recognizing BP elevations that require more investigation, the new pediatric hypertension guidelines provide a simplified table for all ages. Further, the cut points for elevated BP, stage I hypertension, and stage II hypertension are now standard cut points for all children aged 13 years and older. So, the ease by which adult providers can “eyeball” a BP to determine if it elevated or not has been passed along to pediatric providers for this group of children. This will also facilitate the transition of care for these patients as they transfer to adult providers, as the new cutoffs more closely resemble the adult guidelines.

    Probably most notable for children aged younger than 13 years, the new guidelines provide updated normative tables. The tables published in the previous guidelines9 included data from over 60,000 healthy children studied in any of 11 research studies conducted over several decades. As a result, 21% of the children contributing BP values to this normative database were overweight or obese.10 The new tables exclude the data from children with a body mass index ≥85th percentile, resulting in BP norms that are several mm Hg lower than previously published. In addition, the tables now provide the 50th, 90th, 95th, and 95th + 12 mm Hg values instead of 50th, 90th, 95th, and 99th percentiles. This is noteworthy because providers can now use the table to directly determine the BP that corresponds to stage II hypertension (95th + 12 mm Hg) instead of having to calculate it (99th + 5 mm Hg).

    Next: Factoring the metabolic X syndrome

    Making it easier to identify when a child has an elevated BP is only one of the ways in which this new guideline seeks to improve the cardiovascular health of children. It also provides a more streamlined approach to the diagnosis and evaluation of hypertension.


    Clearer guidance is provided regarding the treatment of hypertension, including recommended lifestyle changes and pharmacologic management. Finally, knowledge gaps are identified, to allow for informed interpretation and to guide research efforts.

     

     

    REFERENCES

    1. Berenson GS, Srinivasan SR, Bao WP 3rd, Tracy RE, Wattigney WA. Association between multiple cardiovascular risk factors and atherosclerosis in children and young adults. The Bogalusa Heart Study. N Engl J Med. 1998;338(23):1650-1656.

    2. Strong JP, Malcom GT, McMahan CA, et al. Prevalence and extent of atherosclerosis in adolescents and young adults: implications for prevention from the Pathobiological Determinants of Atherosclerosis in Youth Study. JAMA. 1999;281(8):727-735.

    3. Lauer RM, Clarke WR. Childhood risk factors for high adult blood pressure: the Muscatine Study. Pediatrics. 1989;84(4):633-641.

    4. Shear CL, Burke GL, Freedman DS, Berenson GS. Value of childhood blood pressure measurements and family history in predicting future blood pressure status: results from 8 years of follow-up in the Bogalusa Heart Study. Pediatrics. 1986;77(6):862-869.

    5. Expert Panel on Integrated Guidelines for Cardiovascular Health and Risk Reduction in Children and Adolescents; National Heart, Lung, and Blood Institute. Expert panel on integrated guidelines for cardiovascular health and risk reduction in children and adolescents: summary report. Pediatrics. 2011;128(suppl 5):S213-S256.

    6. Brady TM, Neu AM, Miller ER 3rd, Appel LJ, Siberry GK, Solomon BS. Real-time electronic medical record alerts increase high blood pressure recognition in children. Clin Pediatr (Phila). 2015;54(7):667-675.

    7. Rinke ML, Singh H, Heo M, et al. Diagnostic errors in primary care pediatrics: Project RedDE. Acad Pediatr. August 10, 2017. Epub ahead of print.

    8. Flynn JT, Kaelber DC, Baker-Smith CM, et al; Subcommittee on Screening and Management of High Blood Pressure in Children. Clinical Practice Guideline for Screening and Management of High Blood Pressure in Children and Adolescents. Pediatrics. 2017;140(3):e20171904.

    9. National High Blood Pressure Education Program Working Group on High Blood Pressure in Children and Adolescents. The fourth report on the diagnosis, evaluation, and treatment of high blood pressure in children and adolescents. Pediatrics. 2004;114(2 suppl 4th report):555-576.

    10. Rosner B, Cook N, Portman R, Daniels S, Falkner B. Determination of blood pressure percentiles in normal-weight children: some methodological issues. Am J Epidemiol. 2008;167(6):653-666.

    Mary Beth Nierengarten, MA
    Mary Beth Nierengarten is a freelance medical writer with over 25 years of experience. Her work appears regularly in a number of print ...

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