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Related Concept Videos

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
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Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
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Increased pulse rate01:17

Increased pulse rate

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Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
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Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

140
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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Pulse rhythm01:30

Pulse rhythm

934
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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Related Experiment Video

Updated: Sep 16, 2025

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
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Changes in Heart Rate Variability in Adolescent Patients With Tic Disorders: A 1-Year Prospective Study.

Hyeju Lee1, Nahyung Lee1, Yeje Lim1

  • 1Department of Medicine, College of Medicine, Korea University, Seoul, Republic of Korea.

Psychiatry Investigation
|July 9, 2025
PubMed
Summary
This summary is machine-generated.

Tic disorders are linked to persistent autonomic dysfunction, impacting physiological regulation and quality of life. This dysfunction may worsen over time, highlighting the need for autonomic modulation strategies in treatment.

Keywords:
Heart rate variabilityLongitudinal studyQuality of lifeStressTic disorders

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Measuring Cardiac Autonomic Nervous System ANS Activity in Children
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Measuring Cardiac Autonomic Nervous System ANS Activity in Children
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Area of Science:

  • Neuroscience
  • Autonomic Nervous System Research
  • Clinical Psychology

Background:

  • Tic disorders are neurological conditions affecting motor and vocal functions.
  • Autonomic nervous system (ANS) dysfunction is increasingly recognized as a comorbidity in various neurological disorders.
  • Heart rate variability (HRV) serves as a non-invasive biomarker for assessing ANS function.

Purpose of the Study:

  • To longitudinally investigate the impact of tic disorders on ANS function using HRV.
  • To evaluate the association between ANS function and quality of life in individuals with tic disorders over one year.
  • To explore changes in ANS function and its correlation with quality of life during the follow-up period.

Main Methods:

  • A longitudinal study design involving patients with tic disorders and a control group.
  • Assessment of tic severity using the Yale Global Tic Severity Scale and quality of life with the KIDSCREEN-27 questionnaire.
  • Measurement of autonomic function through various heart rate variability (HRV) parameters over a 1-year period.

Main Results:

  • Patients with tic disorders exhibited lower heart rate variability (HRV), particularly in low-frequency (LF) power, and higher standard deviation of normal-to-normal intervals at baseline, indicating autonomic dysregulation.
  • A progressive decline in HRV indices, especially LF power, was observed in patients over the 1-year follow-up.
  • Significant correlations between HRV metrics and quality of life scores were found at baseline, but these associations weakened during follow-up.

Conclusions:

  • Tic disorders are associated with persistent autonomic dysfunction that can progressively impair physiological regulation and quality of life.
  • The study underscores the importance of considering autonomic modulation strategies within the treatment plans for individuals with tic disorders.
  • Altered correlations between HRV and quality of life during follow-up may reflect treatment effects and homeostatic adaptations.