Learning Objectives and CME/Disclosure Information

This activity is intended for healthcare providers delivering care to women and their families.

After completing this activity, the participant should be better able to:

1. State the new ACC/AHA hypertension classification guidance for blood pressure
2. Apply the guidance for obtaining blood pressure into your practice

Estimated time to complete activity: 0.25 hours

Faculty:

Susan J. Gross, MD, FRCSC, FACOG, FACMG
President and CEO, The ObG Project

Disclosure of Conflicts of Interest

Postgraduate Institute for Medicine (PIM) requires instructors, planners, managers and other individuals who are in a position to control the content of this activity to disclose any real or apparent conflict of interest (COI) they may have as related to the content of this activity. All identified COI are thoroughly vetted and resolved according to PIM policy. PIM is committed to providing its learners with high quality CME activities and related materials that promote improvements or quality in healthcare and not a specific proprietary business interest of a commercial interest.

Faculty: Susan J. Gross, MD, receives consulting fees from Cradle Genomics, and has financial interest in The ObG Project, Inc.

Planners and Managers: The PIM planners and managers, Trace Hutchison, PharmD, Samantha Mattiucci, PharmD, CHCP, Judi Smelker-Mitchek, MBA, MSN, RN, and Jan Schultz, MSN, RN, CHCP have nothing to disclose.

Method of Participation and Request for Credit

Fees for participating and receiving CME credit for this activity are as posted on The ObG Project website. During the period from Dec 31 2017 through Dec 31 2021, participants must read the learning objectives and faculty disclosures and study the educational activity.

If you wish to receive acknowledgment for completing this activity, please complete the post-test and evaluation. Upon registering and successfully completing the post-test with a score of 100% and the activity evaluation, your certificate will be made available immediately.

For Pharmacists: Upon successfully completing the post-test with a score of 100% and the activity evaluation form, transcript information will be sent to the NABP CPE Monitor Service within 4 weeks.

Joint Accreditation Statement

In support of improving patient care, this activity has been planned and implemented by the Postgraduate Institute for Medicine and The ObG Project. Postgraduate Institute for Medicine is jointly accredited by the Accreditation Council for Continuing Medical Education (ACCME), the Accreditation Council for Pharmacy Education (ACPE), and the American Nurses Credentialing Center (ANCC), to provide continuing education for the healthcare team.

Physician Continuing Medical Education

Postgraduate Institute for Medicine designates this enduring material for a maximum of 0.25 AMA PRA Category 1 Credit(s)™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.

Continuing Nursing Education

The maximum number of hours awarded for this Continuing Nursing Education activity is 0.2 contact hours.

Read Disclaimer & Fine Print

SUMMARY:  

The latest USPSTF released its recommendation regarding screening for hypertension in adults (2021). Based on current evidence demonstrating high certainty regarding net benefit, the task force reaffirms and “recommends screening for hypertension in adults 18 years or older with office blood pressure measurement. The USPSTF recommends obtaining blood pressure measurements outside of the clinical setting for diagnostic confirmation before starting treatment. (A recommendation)”.

The ACC/AHA task force report represents the work of several professional bodies based upon hundreds of studies.  There are notable changes from previous practice guidelines, especially related to screening and detection.  The ACC/AHA task force recommends the following classification system:

<120 mmHg and <80 mmHg: NORMAL BP

• Healthy lifestyle choices  

• Yearly check-ups 

120 – 129 mmHg and <80 mmHg: ELEVATED BP

• Healthy lifestyle changes  

• Reassess in 3 to 6 months  

130 – 139 mmHg or 80-89 mmHg: HIGH BP – STAGE 1  

• 10-year heart disease and stroke risk assessment <10% risk 
  • Lifestyle changes  
  • Re-assess in 3 to 6 months 
• 10-year heart disease and stroke risk assessment ≥10% risk 
  • Lifestyle changes  
  • Medication  
  • Monthly follow-up until BP is under control 

≥140 mmHg or ≥90 mmHg: HIGH BP – STAGE 2 

• Lifestyle changes  
• Consider initiation of therapy with 2 different classes of medications 
• Monthly follow-up until BP is under control
• If BP ≥160/100 mm Hg: Treat promptly, monitor carefully and adjust medication dose upward as necessary to achieve control  

NOTE: Calculate 10-year risk of heart disease or stroke using the ASCVD algorithm published in 2013 ACC/AHA Guideline on the Assessment of Cardiovascular Risk (see ‘Learn More – Primary Sources’ below)

KEY POINTS:  

Risk Factors   

• Genetic predisposition  
  • Complex polygenic disorder  
  • Rarely single gene disorder (e.g. Liddle’s or Gordon’s syndrome) 
• Environmental Risk Factors  
  • Overweight and Obesity 
  • Sodium Intake 
  • Potassium  
    • Higher levels appear to blunt sodium effect on BP  
    • Lower sodium/potassium ratio may reduce risk of CVD  
  • Physical fitness  
    • Even modest levels of physical activity is associated with a decrease in the risk of incident hypertension  
  • Alcohol 
    • In US, may account for 10% of BP burden  
    • Also associated with higher HDL and at modest intake range, lower risk for CHD when compared to abstinence 

Non-pharmacological Interventions 

• Weight loss 
  • Goal: Optimum goal is ideal body weight but can expect 1mm Hg for every 1kg reduction 
• Diet 
  • DASH diet: Fruits and vegetables, whole grains, low-fat dairy products, reduced saturated and total fat 
  • Other diets with supportive evidence 
    • Low in calories from carbohydrates  
    • High-protein diets  
    • Vegetarian diets  
    • Mediterranean dietary pattern  
  • Sodium: Goal <1500 mg/d, but aim for at least a 1000-mg/d reduction 
  • Potassium: Goal 3500 to 5000 mg/d, preferably through diet 
• Exercise – Recommend structured exercise program  
  • Aerobic: 90–150 min/wk; 65%–75% heart rate reserve 
  • Dynamic resistance and Isometric resistance also shown to lower BP  
• Alcohol Reduction (drink = 12 oz regular beer [5% alc] / 5 oz wine [12% alc] / 1.5 oz distilled spirits [40% alc])  
  • Women: ≤ 1 drink per day  
  • Men: ≤ 2 drink per day 

Taking a BP 

• Prep 
  • Avoid caffeine, exercise, smoking at least 30 minutes before  
  • Empty bladder 
  • No talking while measurement is taken 
  • Remove clothing covering cuff placement 
  • Patient should sit on chair, feet on floor and back supported for > 5 min before taking pressure (not lying or sitting on an exam table) 
• Technique 
  • Validated device 
  • Support arm 
  • Middle of cuff on upper arm at level of atrium (midpoint of the sternum) 
  • Cuff size: Bladder should encircle 80% of the arm  
  • Can use either stethoscope diaphragm or bell 
• Taking the measurement 
  • First visit: Record BP in both arms and use arm with higher reading for subsequent measurements  
  • Separate measurement by 1 to 2 minutes 
  • To estimate systolic BP, use radial pulse obliteration and then inflate cuff 20-30 mmHg higher  
  • Deflate cuff pressure 2 mmHg per second and listen for Korotkoff sounds  
    • Systolic BP: First Korotkoff sound 
    • Diastolic BP: Disappearance of all Korotkoff sounds  
    • Use nearest even number  
  • Note time of most recent BP medication before taking measurements  
• Average the readings to estimate BP 
  • Use average of ≥ 2 readings obtained on ≥ 2 occasions  

Note: The AHA has released a scientific statement that validated oscillometric devices allow accurate BP measurement in the outpatient setting, while reducing human errors associated with the auscultation. The AHA document further states that

Fully automated oscillometric devices capable of taking multiple readings even without an observer being present may provide a more accurate measurement of BP than auscultation. 

Target BP Goal  

• Known CVD or 10-year heart disease and stroke risk assessment ≥ 10% risk 
  • 130/80 
• Without additional markers of increased CVD risk, a BP target of less than 130/80 mm Hg may be reasonable 

Adults ≥ 65 years 

• Treat to same goal of 130/80 as younger adults  

• Recommendation differs with ACP and AAFP guidance that suggests a goal of 150/90 

Pregnancy Recommendations

• Women with hypertension who become pregnant, or are planning a pregnancy should be transitioned to methyldopa, nifedipine, and/or labetalol during pregnancy
• Do not treat women with hypertension in pregnancy with ACE inhibitors, ARBs, or direct renin inhibitors

Oral Contraceptives and NSAIDs

• Oral contraceptives and NSAIDs are listed as commonly used medications that may cause elevated BP
• The ACC/AHA guideline recommends the following

 OCPs

Use low-dose (e.g., 20–30 mcg ethinyl estradiol) agents or a progestin-only form of contraception, or consider alternative forms of birth control where appropriate (e.g., barrier, abstinence, IUD)

Avoid use in women with uncontrolled hypertension

NSAIDs

Avoid systemic NSAIDs when possible

Consider alternative analgesics (e.g., acetaminophen, tramadol, topical NSAIDs), depending on indication and risk

Learn More – Primary Sources:

Guideline for the Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults – A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines

Screening for Hypertension in Adults: US Preventive Services Task Force Reaffirmation Recommendation Statement

10-year risk calculator using ASCVD algorithm

AHA AMA: BP Treatment Algorithm 

Measurement of Blood Pressure in Humans: A Scientific Statement From the American Heart Association

2019 AHA/ACC Clinical Performance and Quality Measures for Adults With High Blood Pressure: A Report of the American College of Cardiology/American Heart Association Task Force on Performance Measures

Related ObG Topics:

2018 ACC/AHA Multisociety Guideline: Cholesterol Assessment and Primary ASCVD Prevention

ACC / AHA Guideline Recommendations: Low Dose Aspirin for Primary CVD Prevention

What is the Optimal Blood Pressure Target When Treating Hypertension?

Reducing White-Coat Hypertension

Is the DASH Diet Effective for Obese Women with PCOS?

Does Hypertension in Pregnancy Predict Hypertension Later in Life?

Automated BP Cuffs, Home Monitoring and Hypertension Definitions

ACC/AHA Blood Pressure Treatment Guideline: Lifestyle Modification and Drug Therapy