在接受心脏再同步治疗的患者中,使用无监督学习整合封闭的SPECT治疗的临床表型
Giovane Leal de Azevedo Junior1, Noah Painter2, Zhuo He3
1Hospital Universitário Antônio Pedro - Ebserh, Universidade Federal Fluminense, Niterói, Brazil.
Nuclear medicine communications
|October 8, 2025
概括
心脏再同步治疗 (CRT) 的反应有所不同. 无监督学习确定了患者的表型,揭示了实质性心脏纤维化预测CRT反应不佳,这表明量身定制的选择标准可以改善结果.
科学领域:
- 心脏病学 心脏病学
- 医疗成像医学成像
- 人工智能的人工智能
背景情况:
- 心脏再同步疗法 (CRT) 是有效的心力衰竭与左心室失同 (LVdys).
- 然而,30-40%的患者对CRT没有反应.
- 识别不响应者对于优化治疗至关重要.
研究的目的:
- 利用无监督学习来识别具有改善CRT反应率的患者表型.
- 根据临床和成像数据来描述患者组,以便更好地选择治疗.
主要方法:
- 使用无监督学习整合封闭的单光子发射计算机断层扫描 (SPECT).
- 层次聚类分析分组了217名患者,使用了49个预治疗变量.
- 用封闭的SPECT相位分析量化心脏纤维化和LVdys.
主要成果:
- 确定了三种患者表型.
- 两个表型显示高CRT响应率 (86.2%和87.0%) 与不同的特征 (LVdys,纤维化,心脏扩张).
- 第三种表型具有中度的LVdys,实质性纤维化和心脏扩张,表现出不良的CRT反应 (55.9%).
结论:
- 封闭式SPECT的相位分析有助于通过评估异步,纤维化和重塑来描述CRT响应者的特征.
- 患有显著心脏纤维化症的患者从CRT中受益较少.
- 使用封闭式SPECT的定制CRT选择标准可以提高患者的反应率.
更多相关视频
12:45Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
Published on: December 11, 2017
10.9K
12:09Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations
Published on: January 8, 2013
14.1K
相关概念视频
01:30Pulse rhythm
1.3K
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...
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
1.3K
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
401
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
401
01:30Heart Failure IV: Classification and Diagnostic Evaluation
319
Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
319
01:30Cardiac Action Potential
5.7K
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
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
5.7K
01:29Cardiomyopathy V: Interprofessional Care
338
Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
338
01:30Cardiomyopathy II: Dilated Cardiomyopathy
468
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
468