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Related Concept Videos

Decreased pulse rate01:14

Decreased pulse rate

Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with bradycardia...
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
Dementia l: Introduction01:22

Dementia l: Introduction

Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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...
Dementia01:30

Dementia

Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual.
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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 minute.

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Related Experiment Video

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Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains
12:28

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Bradycardia in frontotemporal dementia.

A Robles Bayón1, F Gude Sampedro2, J M Torregrosa Quesada3

  • 1Unidad de Neurología cognitiva, Hospital La Rosaleda, Santiago de Compostela, España.

Neurologia (Barcelona, Spain)
|April 23, 2013
PubMed
Summary

Patients with frontotemporal dementia (FTD) experienced significantly more bradycardia (slow heart rate) than other cognitive impairment groups. This suggests a potential link between FTD and autonomic dysfunction, warranting further investigation.

Keywords:
AlzheimerAmygdalaAmígdalaBradicardiaBradycardiaDemencia frontotemporalFrontotemporal dementiaHipotensiónHypotensionInsulaÍnsula

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Area of Science:

  • Neuroscience
  • Cardiology
  • Neurology

Background:

  • Brain regions controlling heart rate, including the medial frontal cortex and amygdala, are affected by frontotemporal dementia (FTD).
  • Degeneration in these areas may lead to autonomic nervous system dysfunction and cardiovascular symptoms like bradycardia.
  • Autonomic dysfunction, specifically non-cardiogenic bradycardia, is explored as a potential indicator in FTD.

Purpose of the Study:

  • To determine if non-cardiogenic bradycardia is more prevalent in patients with frontotemporal dementia (FTD) compared to other cognitive impairment groups.
  • To investigate the association between FTD and cardiovascular autonomic dysfunction.

Main Methods:

  • Heart rates were recorded for 258 patients with cognitive symptoms, including 36 with FTD.
  • Patients with primary cardiac arrhythmias were excluded from the study.
  • Participants included those with Alzheimer disease, vascular dementia, other dementias, and non-dementia cognitive impairment.

Main Results:

  • Bradycardia (<60 beats/minute) was significantly more frequent in patients with frontotemporal dementia (FTD).
  • This finding persisted even after excluding individuals on bradycardia-inducing medications.
  • FTD patients also exhibited lower mean systolic blood pressure and a higher prevalence of hypotension.

Conclusions:

  • Bradycardia is more common in patients with frontotemporal dementia (FTD) than in other cognitive impairment cohorts.
  • The results suggest a potential role for bradycardia as a diagnostic marker for FTD, particularly its behavioral variant.
  • Further research is needed to confirm bradycardia as a supportive diagnostic sign for FTD.