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Related Concept Videos

Blood Pressure01:30

Blood Pressure

5.7K
Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the...
5.7K
Factors affecting Blood pressure01:28

Factors affecting Blood pressure

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Several physiological and lifestyle factors influence blood pressure (BP). Understanding these factors is crucial as they are significant in patient education and blood pressure management.
Physiological Factors:
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Errors occurring during blood pressure monitoring01:25

Errors occurring during blood pressure monitoring

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Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
Several factors...
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Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

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Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
4.8K
Blood Pressure01:24

Blood Pressure

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The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
11.8K
Measurement of Blood Pressure01:17

Measurement of Blood Pressure

4.1K
Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a...
4.1K

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Related Experiment Video

Updated: Apr 10, 2026

Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
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Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression

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Adequate blood pressure control: perception and reality

T Morgan1

  • 1Department of Physiology, University of Melbourne, Parkville, Victoria, Australia.

European Heart Journal
|December 24, 1997
PubMed
Summary

Achieving 24-hour blood pressure control with once-daily ACE inhibitors requires understanding drug pharmacokinetics. Titrating based on peak response can be effective with specific drugs like perindopril, ensuring consistent hypertension management.

Area of Science:

  • Cardiology
  • Pharmacology

Background:

  • 24-hour blood pressure control is crucial for preventing cardiac events and mortality.
  • Once-daily antihypertensive medication dosing often leads to inadequate control due to peak-dose titration.
  • Angiotensin-converting enzyme (ACE) inhibitors have a concentration-response relationship impacting their 24-hour efficacy.

Purpose of the Study:

  • To evaluate the effectiveness of once-daily ACE inhibitors for 24-hour blood pressure control.
  • To determine optimal titration strategies considering drug pharmacokinetics and pharmacodynamics.
  • To identify ACE inhibitors suitable for peak-dose titration to achieve sustained blood pressure management.

Main Methods:

  • Analysis of ACE inhibitor pharmacokinetics and pharmacodynamics.
  • Review of blood pressure monitoring data related to drug administration timing.

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  • Comparison of titration strategies based on peak versus trough blood pressure measurements.

    • Main Results:

    • Short-acting ACE inhibitors may provide inadequate control when titrated based on peak blood pressure.
    • ACE inhibitors with specific pharmacokinetic profiles, like perindopril (4 or 8 mg), can achieve 24-hour control even with peak-dose titration.
    • A trough-to-peak (T:P) ratio near 1.0 is indicative of effective 24-hour blood pressure control.

    Conclusions:

    • Understanding drug pharmacokinetics and pharmacodynamics is key to optimizing once-daily antihypertensive therapy.
    • Peak-dose titration can achieve sustained blood pressure control with appropriate ACE inhibitors and dosing.
    • Individualized therapy considering drug properties and patient monitoring enables effective hypertension management.