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Related Concept Videos

Blood Pressure01:30

Blood Pressure

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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...
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Hypertension and Regulation of Blood Pressure01:18

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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...
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Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
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The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
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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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Special considerations while measuring blood pressure01:28

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When assessing blood pressure (BP), healthcare professionals must consider various factors and potential unexpected outcomes to ensure accurate readings and provide proper patient care. Adhering to these guidelines is essential to achieving the most reliable results.
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
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Real-Time Monitoring and Modulation of Blood Pressure in a Rabbit Model of Ischemic Stroke
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STIMulating blood pressure.

Tessa A C Garrud1, Jonathan H Jaggar1

  • 1Department of Physiology, University of Tennessee Health Science Center, Memphis, United States.

Elife
|March 24, 2022
PubMed
Summary

The protein STIM1 is crucial for smooth muscle cells, maintaining membrane coupling sites that control arterial contractility and blood pressure regulation.

Keywords:
STIM1Stromal Interaction Moleculesblood pressuremolecular biophysicsmouseperipheral coupling sitessmooth musclestore-operated calcium entrystructural biology

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Area of Science:

  • Biochemistry
  • Physiology
  • Molecular Biology

Background:

  • Smooth muscle cells are vital for regulating vascular tone and blood pressure.
  • Membrane coupling sites play a critical role in cellular communication and function within smooth muscle.

Purpose of the Study:

  • To investigate the role of the protein STIM1 in maintaining membrane coupling sites in smooth muscle cells.
  • To understand how STIM1 influences arterial contractility and blood pressure regulation.

Main Methods:

  • Utilized molecular biology techniques to study STIM1 expression and localization.
  • Employed physiological assays to assess arterial contractility.
  • Investigated membrane coupling site integrity in smooth muscle cells.

Main Results:

  • STIM1 was found to be essential for the maintenance of functional membrane coupling sites.
  • Disruption of STIM1 function led to altered arterial contractility.
  • STIM1's role in membrane coupling directly impacts blood pressure regulation.

Conclusions:

  • The protein STIM1 is a key regulator of smooth muscle cell function.
  • STIM1's contribution to membrane coupling sites is critical for maintaining normal arterial contractility and blood pressure.