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Related Concept Videos

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...
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...
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism, and...
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...

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Related Experiment Video

Updated: May 17, 2026

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

Published on: July 5, 2021

Bradyarrhythmias in the elderly.

Preetham Kumar1, Fred M Kusumoto, Nora Goldschlager

  • 1Electrophysiology and Pacing Service, Division of Cardiovascular disease, Department of Medicine, Mayo Clinic, 4500 San Pablo Avenue, Jacksonville, FL 32224, USA.

Clinics in Geriatric Medicine
|October 30, 2012
PubMed
Summary
This summary is machine-generated.

The global elderly population is growing, leading to more cases of bradyarrhythmias like sinus node dysfunction and atrioventricular block. Healthcare providers need to understand these conditions for effective management in older adults.

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Last Updated: May 17, 2026

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

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Published on: February 14, 2022

Area of Science:

  • Geriatric Medicine
  • Cardiology
  • Electrophysiology

Background:

  • The global population is aging, with a projected increase in elderly individuals over the next decade.
  • This demographic shift will correlate with a rise in cardiovascular conditions, specifically bradyarrhythmias.

Purpose of the Study:

  • To highlight the growing prevalence of bradyarrhythmias in the elderly population.
  • To emphasize the necessity for healthcare professionals to possess foundational knowledge in managing these conditions in older patients.

Main Methods:

  • Review of demographic trends and their impact on cardiovascular disease incidence.
  • Analysis of clinical considerations for managing bradyarrhythmias in geriatric patients.

Main Results:

  • Anticipated increase in sinus node dysfunction and atrioventricular block among the elderly.
  • Critical need for comprehensive patient assessment prior to treatment decisions.

Conclusions:

  • Effective management of bradyarrhythmias in the elderly requires a thorough understanding of the condition and patient-specific factors.
  • Treatment decisions must integrate medical, device-based interventions, social determinants, and comorbid conditions for optimal geriatric care.