[Systolic, diastolic and pulse pressure: pathophysiology]
1Dipartimento di Medicina Clinica e Sperimentale, Università degli Studi Federico II, Napoli. simogi@unina.it
Summary
Arterial hypertension involves abnormal flow and resistance. Increased pulse pressure, especially in isolated systolic hypertension, can indicate altered arterial elasticity and potential target organ damage.
Area of Science:
- Cardiovascular Physiology
- Hypertension Pathophysiology
Context:
- Arterial hypertension arises from complex flow/resistance dynamics.
- Systemic resistance influences diastolic blood pressure; arterial elasticity affects diastolic run-off.
Purpose:
- To elucidate the relationship between arterial elasticity, pulse pressure, and different types of hypertension.
- To differentiate isolated systolic hypertension based on peripheral resistance.
Summary:
- Decreased arterial elasticity reduces diastolic run-off, lowering diastolic blood pressure and increasing systolic blood pressure, thus elevating pulse pressure.
- Elevated pulse pressure with normal mean pressure suggests normal peripheral resistance, while high mean pressure indicates high resistance and potential severe arterial damage.
Impact:
- Highlights pulse pressure as a marker for altered arterial conductance and potential target organ damage.
- Emphasizes considering all blood pressure components (systolic, diastolic, mean) for accurate hypertension assessment and classification.
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