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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

1.5K
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...
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ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

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An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
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Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

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Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
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Special considerations while measuring pulse01:13

Special considerations while measuring pulse

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Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
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Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

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Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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Related Experiment Video

Updated: Mar 2, 2026

Uncovering Beat Deafness: Detecting Rhythm Disorders with Synchronized Finger Tapping and Perceptual Timing Tasks
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Uncovering Beat Deafness: Detecting Rhythm Disorders with Synchronized Finger Tapping and Perceptual Timing Tasks

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An "eye" for rhythm.

Jeffrey Haspel1

  • 1Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, MO 63130, USA.

Science Translational Medicine
|May 19, 2017
PubMed
Summary
This summary is machine-generated.

Scientists developed a new method to reconstruct circadian gene expression from human biopsy samples. This breakthrough enables detailed analysis of daily biological rhythms in tissues.

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Last Updated: Mar 2, 2026

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Area of Science:

  • Molecular Biology
  • Chronobiology
  • Genomics

Background:

  • Circadian rhythms are fundamental biological processes influencing gene expression.
  • Analyzing circadian gene expression in human tissues is challenging due to sample limitations.

Purpose of the Study:

  • To develop and validate a novel analytical method for reconstructing circadian gene expression patterns.
  • To enable the study of temporal gene regulation in human biopsy samples.

Main Methods:

  • Development of a computational method for inferring gene expression rhythms.
  • Application of the method to human biopsy data.
  • Validation of reconstructed circadian profiles.

Main Results:

  • Successfully reconstructed circadian gene expression profiles from human biopsy samples.
  • Demonstrated the method's ability to capture temporal dynamics of gene activity.
  • Identified key genes exhibiting circadian regulation in the studied tissues.

Conclusions:

  • The new analytical method provides a powerful tool for studying circadian biology in human tissues.
  • This approach facilitates research into circadian rhythm disruptions and their health implications.