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相关概念视频

Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

860
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...
860
Decreased pulse rate01:14

Decreased pulse rate

529
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...
529
Cardiac Action Potential01:30

Cardiac Action Potential

793
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
793
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

872
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.
872
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

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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,...
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Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

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The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
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Updated: May 26, 2025

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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一次性,持续性和永久性类型-1 布鲁加达模式:负担是否重要?

Thanaboon Yinadsawaphan1,2, Pattara Rattanawong1,3, Narathorn Kulthamrongsri1,2

  • 1Department of Cardiovascular Medicine, Mayo Clinic, Phoenix, AZ 85054, USA.

Journal of cardiovascular development and disease
|February 25, 2025
PubMed
概括

在心电图 (ECG) 上发现的自发型-1 Brugada 模式的负担可能与严重心律失常事件风险相关. 较高的模式持久性表明这些心脏事件的潜在风险增加.

关键词:
布鲁加达布鲁加达布鲁加达节律失常 节律失常这是一个沉重的负担.大型心律失常事件自发型-1 布鲁加达 布鲁加达

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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

背景情况:

  • 自发型-1 布鲁加达模式表明主要心律失常事件的风险增加.
  • 布鲁加达模式负担的程度与第一个主要心律失常事件的风险之间的关联尚未确定.

研究的目的:

  • 调查自发型-1布鲁加达模式的负担与经历第一个主要心律失常事件的风险之间的关系.

主要方法:

  • 64名自发型-1布鲁加达模式的成年患者的回顾性队列研究.
  • 患者接受了连续的12导电心电图 (ECG) 测量模式量化.
  • 模式负担分为偏激 (<50%),持久 (50-99%) 或永久 (100%) 的类别.
  • 随访时间中位数为92个月,不包括有先前事件的患者.

主要成果:

  • 七名患者 (11%) 经历了他们的第一个主要心律失常事件.
  • 事件发生在一个偏激性,四个持久性和两个永久性模式组中.
  • 危险比率表明风险增加的趋势与更高的模式负担,虽然不是统计学上显著.
  • 没有观察到心脏突然死亡.

结论:

  • 较高的自发型-1 Brugada 模式的负担可能与严重心律失常事件的风险增加有关.
  • 需要进一步的研究来澄清不同布鲁加达模式负担的预后意义.