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Related Concept Videos

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

4.0K
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...
4.0K
Pulse01:16

Pulse

2.8K
When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
2.8K
Pulse01:05

Pulse

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The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...
4.7K
Pulse rhythm01:30

Pulse rhythm

1.7K
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
1.7K
Electrocardiogram01:29

Electrocardiogram

10.3K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
10.3K
Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

3.0K
To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:
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Related Experiment Video

Updated: Apr 19, 2026

Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis
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Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis

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Photoplethysmography.

Aymen A Alian1, Kirk H Shelley1

  • 1Department of Anesthesiology, Yale University School of Medicine, New Haven, CT, USA.

Best Practice & Research. Clinical Anaesthesiology
|December 7, 2014
PubMed
Summary

The photoplethysmographic (PPG) waveform, or pulse oximeter waveform, offers valuable clinical insights beyond heart rate and oxygen saturation. Advanced signal processing may unlock its potential for guiding early goal-directed therapies.

Area of Science:

  • Biomedical Engineering
  • Physiology
  • Medical Device Technology

Background:

  • The photoplethysmographic (PPG) waveform, commonly seen on pulse oximeters, is a widely used clinical signal.
  • Its underlying technology involves measuring light absorption in tissue, amplified and filtered to highlight pulsatile components.
  • Physiologically, the PPG results from complex interactions within the cardiovascular, respiratory, and autonomic systems.

Purpose of the Study:

  • To explore the expanded utility of the PPG waveform beyond its current applications.
  • To investigate the potential of advanced digital signal processing for extracting novel physiological parameters from PPG signals.
  • To integrate these new parameters with functional hemodynamics for improved clinical decision-making.

Main Methods:

Keywords:
PPGnoninvasive cardiovascular monitorplethpulse oximeter waveform

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  • Analysis of PPG waveform using advanced digital signal processing techniques.
  • Correlation of PPG-derived parameters with cardiovascular and respiratory system interactions.
  • Exploration of PPG signal modifications for detecting ventilator-induced modulations.

Main Results:

  • The PPG waveform is already effective for monitoring cardiac arrhythmias, especially with electrocardiogram (ECG) integration.
  • Modified PPG displays can reveal ventilator-induced modulations linked to hypovolemia.
  • Ongoing research aims to develop new physiological parameters from PPG analysis.

Conclusions:

  • The PPG waveform holds untapped potential for clinical applications.
  • Advanced signal processing and a deeper understanding of functional hemodynamics can expand its utility.
  • The ultimate goal is to use PPG to guide early goal-directed therapies, potentially replacing invasive monitoring methods.