The importance of diastolic blood pressure in predicting cardiovascular risk
1Heart Disease Prevention Program, University of California, Irvine, California, USA.
Insights
Diastolic blood pressure (DBP) provides crucial insights into cardiovascular risk beyond systolic blood pressure (SBP). Different hypertension subtypes, like isolated systolic hypertension (ISH) and isolated diastolic hypertension (IDH), have distinct characteristics and risks across age groups.
Area of Science:
- Cardiology
- Hypertension Research
- Vascular Medicine
Background:
- Brachial systolic blood pressure (SBP) is a primary cardiovascular risk predictor.
- Diastolic blood pressure (DBP) offers additional insights, unaffected by pressure amplification.
- Understanding DBP in conjunction with SBP is vital for comprehensive cardiovascular risk assessment.
Purpose of the Study:
- To analyze the significance of diastolic blood pressure (DBP) in various hypertensive states.
- To differentiate the clinical implications of isolated systolic hypertension (ISH) and isolated diastolic hypertension (IDH) across different age groups.
- To highlight the distinct cardiovascular risks associated with varying DBP and SBP patterns.
Main Methods:
- Analysis of blood pressure measurements, specifically systolic (SBP) and diastolic (DBP).
- Stratification of hypertensive patients based on age and blood pressure patterns (ISH, IDH, systolic-diastolic hypertension).
- Correlation of hypertension subtypes with clinical characteristics, comorbidities, and cardiovascular outcomes.
Main Results:
- Isolated systolic hypertension (ISH) in young adults (mean age 20) is linked to elevated stroke volume/arterial stiffness, predominantly in males, and is not benign.
- Isolated diastolic hypertension (IDH) in younger adults (mean age 40) predominantly affects men, is associated with metabolic syndrome, and may precede systolic-diastolic hypertension, diabetes, and cardiovascular issues.
- Older adults with ISH and low DBP (mean age >/=60) exhibit left ventricular hypertrophy, arterial stiffness, diastolic dysfunction, and heart failure.
- Very high DBP in older individuals indicates potential hypertensive urgencies, emergencies, secondary hypertension, or high peripheral resistance.
Conclusions:
- DBP assessment alongside SBP is crucial for identifying specific hypertensive subtypes and their associated risks.
- Hypertension subtypes like ISH and IDH present unique challenges and risks depending on age and patient demographics.
- Early identification and management of distinct hypertension patterns are essential for preventing cardiovascular complications and other adverse health outcomes.
Abstract:
Brachial systolic blood pressure (SBP) is the overall best predictor of future cardiovascular risk for the entire hypertensive population; however, there is much that can be learned from assessing diastolic blood pressure (DBP) in relation to simultaneous levels of SBP, because the former is not distorted by pressure amplification. Low DBP in very young adults (mean age 20 years), presenting as isolated systolic hypertension (ISH), results from elevation in stroke volume and/or arterial stiffness. This subtype of hypertension has a marked male predominance, occurs twice as frequently as essential hypertension, and is potentially not a benign condition. In contrast, isolated diastolic hypertension (IDH) in young adults (mean age of 40 years) with IDH occurs predominantly in men with a high prevalence of metabolic syndrome. Indeed, persons with IDH frequently evolve into systolic-diastolic hypertension and are potentially at increased risk for future diabetes and cardiovascular complications. The older age population with ISH and low DBP (mean age >/=60 years of age) has a high prevalence of left ventricular hypertrophy, increased ventricular-arterial stiffness, and a tendency for diastolic dysfunction and heart failure. Finally, concordant very high DBP, especially in older persons, defines potential hypertensive urgencies, emergencies, secondary forms of hypertension, and other high peripheral resistance states.
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