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Related Concept Videos

Measurement of Blood Pressure01:17

Measurement of Blood Pressure

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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...
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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...
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Pressure Relationships in Thoracic Cavity01:24

Pressure Relationships in Thoracic Cavity

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Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs...
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Sites for measruring blood pressure01:21

Sites for measruring blood pressure

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Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
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Special considerations while measuring blood pressure01:28

Special considerations while measuring blood pressure

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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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Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

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Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
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Updated: Aug 22, 2025

Author Spotlight: Enhancing Vascular Function and Physical Capacity in Cardiovascular Disease Through Novel Interventions and NIRS Technology
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Nonhyperemic Pressure Ratios-All the Same or Nuanced Differences?

Samineh Sehatbakhsh1, Weijia Li2, Tatsunori Takahashi2

  • 1Division of Cardiology, Montefiore Medical Center, Albert Einstein College of Medicine, 111 210th Street, Bronx, NY 10467, USA.

Interventional Cardiology Clinics
|November 13, 2022
PubMed
Summary
This summary is machine-generated.

Fractional flow reserve (FFR) is the standard for assessing coronary artery disease (CAD), but its use is limited. This review explores wire-based alternatives to FFR, discussing their development, evidence, and limitations.

Keywords:
Coronary artery diseaseFractional flow reserveNonhyperemic pressure ratios

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Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Medical Devices

Background:

  • Fractional flow reserve (FFR) is the gold standard for assessing the functional significance of coronary artery disease (CAD).
  • Despite strong evidence, FFR adoption is limited by invasive procedures and hyperemia induction.
  • Daily practice faces challenges with FFR implementation.

Purpose of the Study:

  • To review wire-based alternatives to FFR for assessing CAD.
  • To provide insights into the development and clinical evidence of these alternatives.
  • To discuss the limitations of current FFR alternatives.

Main Methods:

  • Literature review of wire-based FFR alternatives.
  • Analysis of development pathways for new technologies.
  • Evaluation of clinical evidence and limitations.

Main Results:

  • Several wire-based alternatives to FFR have been developed.
  • Clinical evidence for these alternatives varies.
  • Limitations include technical challenges and incomplete data.

Conclusions:

  • Wire-based alternatives offer potential solutions to FFR limitations.
  • Further research is needed to establish their role in CAD management.
  • These alternatives may improve FFR accessibility and reduce procedural burden.