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相关概念视频

Pulse rhythm01:30

Pulse rhythm

769
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
769
Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

3
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...
3
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

916
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...
916
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

894
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.
894
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers

716
Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
716

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相关实验视频

Updated: Jun 11, 2025

Advanced Cardiac Rhythm Management by Applying Optogenetic Multi-Site Photostimulation in Murine Hearts
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BOATMAP:贝叶斯优化对单态心律失常的积极准节奏映射

Casey Meisenzahl1, Karli Gillette2, Anton J Prassl3

  • 1Rochester Institute of Technology, Rochester, NY, USA.

Computers in biology and medicine
|September 29, 2024
PubMed
概括
此摘要是机器生成的。

这项研究介绍了BOATMAP,这是一种积极学习方法,可以使用12导电心电图 (ECG) 精确定位心室动脉冲动的起源. 它指导临床医生到最佳的节奏点,以改善除疗法规划.

关键词:
积极学习是指积极学习.电心电图 (ECG) 是一种心电图.节奏映射 - 节奏映射是指节奏映射.腹腔动脉短心症是因为心室短心.

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科学领域:

  • 计算心脏病学计算心脏病学
  • 机器学习在医学中的应用
  • 电子生理学 电子生理学

背景情况:

  • 腹腔动脉高心率切除需要精确地定位激活来源.
  • 当前的机器学习方法面临的挑战是患者的变化和训练的最佳数据选择.
  • 需要针对患者的特定模型,并提供可解释的步伐绘制指导.

研究的目的:

  • 引入BOATMAP,一种用于定位心室激活的新型主动学习方法,源自12心电图.
  • 为临床医生提供可解释的实时指导,帮助他们选择最佳的节奏点.
  • 开发一个特定于患者的模型,以考虑个体的心脏解剖学和组织特性.

主要方法:

  • 开发了BOATMAP,一种使用高斯过程 (GP) 作为替代模型的积极学习策略.
  • 逆转了输入-输出关系,以学习ECG相似性作为节奏点坐标的函数.
  • 嵌入式约束,以避免在不可活性的区域步行,如心肌痕.

主要成果:

  • 在模拟中仅使用8.0±4.0节奏点,实现了3.9±3.6mm的平均定位精度.
  • 在各种心脏几何形状和组织特性中展示了精确的定位.
  • 为临床决策提供实时,可解释的指导.

结论:

  • 通过使用主动学习,BOATMAP准确有效地定位心室激活源.
  • 这种方法通过提供可解释的指导来改善临床决策,从而改善了废弃疗法.
  • BOATMAP代表了电生理学患者特定建模的重大进步.