变种特定的晚期加多增强模式影响LMNA相关心肌病的临床结果
Matteo Castrichini1, Ramin Garmany2,3, Konstantinos C Siontis1
1Department of Cardiovascular Medicine Mayo Clinic Rochester MN USA.
Journal of the American Heart Association
|July 21, 2025
概括
导致遗传性心肌病的LMNA变异在心脏MRI上显示出不同的模式. 在IgD领域的变异与"伪心脏病"模式有关,增加心律失常和血栓的风险,但降低AV阻塞和AFib的风险.
科学领域:
- 心脏病学 心脏病学
- 遗传学 是一个遗传学.
- 医疗成像医学成像
背景情况:
- 拉敏A/C (LMNA) 变种导致带有心律失常和功能障碍的遗传心肌病.
- LMNA变种类型和位置对心脏磁共振成像 (MRI) 发现和临床结果的影响尚未得到充分理解.
研究的目的:
- 调查LMNA变体类型/局部化,心脏MRI上的晚期加多增强 (LGE) 模式和心律失常/扩张心肌病患者的临床结果之间的关系.
主要方法:
- 对822名患有LMNA变异的患者进行了回顾性分析.
- 分析了心脏MRI数据,包括LGE分布.
- 临床结果,如心力衰竭,血栓塞栓事件和心脏突然死亡,根据变体类型和局部情况进行评估.
主要成果:
- 在72名心脏MRI患者中,56%显示LGE,主要是非血性心肌中部/心下部模式.
- 在15%的病例中观察到一种独特的"伪心脏病发作"转移性LGE模式,仅在患有C端IgD (免疫球蛋白类似域) 变异的患者中.
- IgD变异与心房阻塞和心房的较低率有关,但血栓栓塞事件的更高率,并预测了心脏突然死亡/主要心室节律失常.
结论:
- 在IgD域中的LMNA误解变异与明显的顶端"伪心脏病发作"LGE模式有关.
- 这种模式与心室心律不整和血栓栓塞事件的风险增加相关,以及心房阻塞和心房的风险降低.
- 需要针对变种的风险分层策略,以改善心脏层状病的管理.
相关概念视频
Cardiomyopathy III: Hypertrophic Cardiomyopathy
52
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...
52
Mitral Stenosis II: Clinical features and Diagnostic Tests
37
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
37
Cardiomyopathy II: Dilated Cardiomyopathy
23
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,...
23
Cardiomyopathy IV: Restrictive Cardiomyopathy
35
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
35
Myocarditis II: Clinical Features and Diagnostic Tests
24
Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
24


