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相关概念视频

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

3
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...
3
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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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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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

3
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...
3
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

193
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,...
193
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

909
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...
909
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

892
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.
892

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Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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耳前和生病鼻综合征

Jean Jacques Noubiap1, Thomas A Dewland1, Jeffrey E Olgin1

  • 1Division of Cardiology, Department of Medicine, University of California-San Francisco, San Francisco, California.

Heart rhythm
|October 24, 2024
PubMed
概括

心房动 (AFL) 显著增加患有恶性鼻综合征 (SSS),昏迷和心脏起器植入的风险,特别是当与心房动 (AF) 同时发生时. 早期发现AFL可以帮助预测和管理SSS.

关键词:
心房动是一种心房动.在心房动.起器是一种心脏起器.恶心鼻综合征是什么意思昏迷症 (Syncope) 是一种昏迷的症状.

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科学领域:

  • 心脏病学 心脏病学
  • 电子生理学 电子生理学
  • 公共卫生 公共卫生

背景情况:

  • 病鼻综合征 (SSS) 影响生活质量,需要植入心脏起器.
  • 对于SSS的预测因素仍然不完全理解.
  • 据推测,心房动 (AFL) 是由于共享纤维化机制的SSS的强有力的预测因素.

研究的目的:

  • 评估心房 (AFL) 与患有恶性鼻综合征 (SSS) 的发生率之间的关联.
  • 评估AFL对昏迷和永久心脏起器 (PPM) 植入的影响.
  • 为了研究AFL和心房 (AF) 对SSS发展的综合影响.

主要方法:

  • 利用来自加利福尼亚州 (2005-2019) 的大规模医疗保健数据库.
  • 包括被诊断为AFL和/或心房动 (AF) 的成年患者 (≥18岁).
  • 采用了考克斯的比例风险模型,调整了人口统计学和并发病因素.

主要成果:

  • 分析了超过2900万个人的数据.
  • 单独或联合,AF和AFL都与增加的SSS,昏迷和PPM植入风险显著相关 (P < .001).
  • 在患有AF的患者中,同时诊断出AFL增加了SSS (HR,1.62),昏迷 (HR,1.63) 和PPM植入 (HR,1.74) 的风险.

结论:

  • 耳前 (AFL) 与患上鼻综合征 (SSS) 和其并发症的风险更高有关.
  • 在患有同时存在心房动 (AF) 的患者中,风险会增加.
  • 在SSS预测,预防和治疗中,AFL可以作为风险分层的有价值标志物.