Related Experiment Video
Updated: May 17, 2026

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.
Abstract:
Over the next decade, there will be a dramatic increase in the number of elderly people in the United States and in most parts of the world. With this increase, there will be an accompanying increase in patients with sinus node dysfunction and atrioventricular block; therefore, it will be essential for health care personnel to have a basic knowledge of bradyarrhythmias and the considerations required for managing these rhythms in elderly patients. In particular, comprehensive assessment before decisions on medical and device-based management is critical and must take into account social issues and the presence of comorbid conditions.
Related Concept Videos
Dysrhythmias IV: Characteristics of Bradyarrhythmias
Decreased pulse rate
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with bradycardia...
Mechanism of Cardiac Arrhythmias
Dysrhythmias VI: Management of Dysrhythmias
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias
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 Rhythm
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
