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相关概念视频

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

263
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,...
263
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

12
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...
12
Dysrhythmias I: Introduction01:15

Dysrhythmias I: Introduction

21
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...
21
Conduction System of the Heart01:20

Conduction System of the Heart

1.2K
The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
1.2K
Decreased pulse rate01:14

Decreased pulse rate

571
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...
571
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

6.6K
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
6.6K

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Updated: Jul 26, 2025

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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鼻腔节点功能障碍是什么

Neeraj Sathnur1, Emanuel Ebin2, David G Benditt2

  • 1Cardiac Arrhythmia Service, Cardiovascular Division, University of Minnesota Medical School, Minneapolis, MN, USA; Cardiovascular Medicine, University of Minnesota Medical School, Mail Code 508, 420 Delaware St SE, Minneapolis, MN 55455, USA; Cardiac Electrophysiology, Park-Nicollet Medical Center, St Louis Park, Minneapolis, MN, USA.

Cardiology clinics
|June 15, 2023
PubMed
概括
此摘要是机器生成的。

在老年人中常见的鼻节功能障碍 (SND) 是通过心电图来诊断的. 治疗重点在于控制胸和心跳缓慢的症状,以防止昏迷和跌倒.

关键词:
心是什么意思 心是什么意思勃拉迪卡迪 - 胆心跳动综合征恶心鼻综合征是什么意思阴道节的功能障碍

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Generation of Murine Cardiac Pacemaker Cell Aggregates Based on ES-Cell-Programming in Combination with Myh6-Promoter-Selection
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Methods for the Isolation, Culture, and Functional Characterization of Sinoatrial Node Myocytes from Adult Mice
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相关实验视频

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

  • 心脏病学 心脏病学
  • 电力生理学 电力生理学
  • 老年病的医生 老年病的医生

背景情况:

  • 鼻节功能障碍 (SND) 是一种复杂的心脏疾病.
  • 它主要影响老年人,但可以发生在任何年龄.
  • SND诊断严重依赖于心电图 (ECG) 的发现.

研究的目的:

  • 概述鼻节功能障碍的诊断方法.
  • 讨论SND的治疗策略,考虑共存的条件.
  • 强调预防节律失常症和节律失常症并发症的重要性.

主要方法:

  • 诊断主要包括记录SND的ECG表现.
  • 电生理学研究 (EPS) 的诊断实用性有限.
  • 治疗决策以患者的症状和心电图模式为指导.

主要成果:

  • SND诊断是通过特征性的心电图发现来确立的.
  • 在SND患者中,勃心脏和心跳缓慢的同时存在是常见的.
  • 患有SND的老年患者往往有并发症,如高血压和冠状动脉疾病.

结论:

  • 有效的SND管理需要解决节律失常症和动脉节律失常症.
  • 预防失眠,跌倒和血栓栓塞等并发症至关重要.
  • 治疗策略必须是个性化的,特别是在有多种健康问题的老年患者中.