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Use of Impedance Cardiography to Guide Blood Pressure Lowering Medication Selection: Systematic Review of Randomized
Anthony J Viera1, Lauren Hart1, Pedro Gomez Altamirano1
1Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, NC, USA.
Insights
Impedance cardiography (ICG) guided medication selection improved blood pressure (BP) control in hypertensive patients compared to usual care. This method shows promise for better short-term BP management in clinical settings.
Area of Science:
- Cardiology
- Hypertension Management
- Medical Devices
Background:
- Achieving blood pressure (BP) control is challenging due to medication selection complexities.
- Impedance cardiography (ICG) offers point-of-care hemodynamic data to personalize hypertension treatment.
- A systematic review evaluated ICG's efficacy in guiding antihypertensive medication selection.
Approach:
- Systematic review of randomized controlled trials (RCTs) comparing ICG-guided therapy to usual care.
- Searched Medline (1946-2024) using MeSH terms and keywords for relevant English-language studies.
- Included RCTs focused on hypertensive patients and BP control outcomes.
Key Points:
- Six RCTs met inclusion criteria, with studies published between 2002 and 2021.
- Participants receiving ICG-guided medication showed significantly greater short-term BP reduction.
- Odds ratios for achieving BP control (<140/90 mm Hg) at 3 months ranged from 1.87 to 2.92.
- The benefits of ICG guidance were observed in both specialty and primary care settings.
Conclusions:
- Integrating impedance cardiography into clinical practice may enhance medication selection for hypertension.
- ICG-guided therapy can lead to a higher proportion of patients achieving short-term blood pressure control.
- This approach supports personalized medicine strategies for managing hypertension.
Background:
Blood pressure (BP) control can be difficult to attain due to multiple factors, including choosing and titrating antihypertensive medications. Measurement of hemodynamic parameters using impedance cardiography (ICG) at the point of care may allow better alignment of medication with the mechanism(s) underlying an individual's hypertension. We conducted a systematic review of randomized controlled trials of ICG compared to usual care for attainment of BP control.
Methods:
We searched Medline inclusive of the year 1946 to January 31, 2024, using a combination of MeSH terms and keywords. English-language articles were eligible for inclusion if they described results of a randomized controlled trial designed to compare ICG-guided BP-medication selection to usual care (i.e., clinician judgment/guidelines-based alone) among a sample of hypertensive patients.
Results:
Of 1,952 titles screened, 6 trials met inclusion criteria. The first was published in 2002 from a specialty clinic in the United States, and the most recent in 2021 from a specialty clinic in China. One trial was conducted in a primary care setting. Sample sizes ranged from 102 to 164. Participants randomized to ICG-guided antihypertensive medication had reduced BP in the short-term to a greater extent than those randomized to usual care, with odds ratios for BP control (<140/90 mm Hg) at 3 months ranging from 1.87 to 2.92. This effect was seen in both specialty clinics and in a primary care setting.
Conclusions:
Incorporation of ICG in the clinical setting may facilitate medication selection that leads to a greater proportion of patients obtaining BP control in the short term.
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