Exploring cardiac vector propagation in acute myocardial infarction: a spatial velocity perspective.

IF 1.6 Q3 CARDIAC & CARDIOVASCULAR SYSTEMS

Future cardiology Pub Date : 2024-12-01 Epub Date: 2024-12-18 DOI:10.1080/14796678.2024.2440257

Tania Ghosal, Anjan Hembram, Imran Ahmed, Damodar Prasad Goswami, Anupam Bandyopadhyay, Arnab Sengupta

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引用次数: 0

Abstract

Aims: To objectively characterize the spatial-velocity dynamics of the QRS-loop in the vectorcardiogram (VCG) of patients with acute myocardial infarction (AMI).

Methods: VCG was constructed as a space curve directly with three quasi-orthogonal leads I, aVF and V2 recorded by conventional ECG of 25 healthy individuals and 50 AMI patients. Spatial velocity (SV) of the dynamic QRS loop, spatial distance (SD), and spatial magnitude (SM) were recorded, along with axis-specific component attributes of vector magnitude such as ΔX, ΔY, and ΔZ.

Results: Decreased SV (12-25%, p = 0.02) and SD (10-26%, p = 0.02) and altered spatial propagation patterns of ventricular vectors in AMI were recorded, with changes in specific axes based on infarct location. Significant vector changes were found in the Y-Axis in IWMI (p = 0.005) and X-Axis in cases of AWMI (p = 0.02), as compared to controls. There was no apparent alteration of SM in AMI.

Conclusion: Decreased SV and SD without any significant alteration of SM indicates close approximation and clustering of the tips of the ventricular vector in AMI. This may be due to dilation, thinning, and stress of the ventricular wall in early post infarction ventricular remodeling, along with relative ischemia due to associated tachycardia and higher myocardial oxygen demand.

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探索急性心肌梗死中的心脏矢量传播：空间速度视角。

目的：客观表征急性心肌梗死（AMI）患者矢量心电图（VCG）中qrs环的空间-速度动力学特征。方法：将25例健康人与50例AMI患者的常规心电图记录的VCG以I、aVF、V2三个拟正交导联直接构成空间曲线。记录动态QRS环路的空间速度（SV）、空间距离（SD）、空间震级（SM）以及矢量震级的轴向分量属性（ΔX、ΔY、ΔZ）。结果：心肌梗死时SV （12-25%, p = 0.02）和SD （10-26%, p = 0.02）降低，心室载体空间传播模式改变，并根据梗死部位发生特定轴向变化。与对照组相比，IWMI患者的y轴（p = 0.005）和AWMI患者的x轴（p = 0.02）发生了显著的矢量变化。AMI患者SM无明显改变。结论：SV和SD降低，但SM无明显改变，表明AMI心室矢量尖端接近和聚类。这可能是由于梗死后心室重构早期心室壁的扩张、变薄和压力，以及相关的心动过速和心肌需氧量增高引起的相对缺血。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Future cardiology CARDIAC & CARDIOVASCULAR SYSTEMS-

CiteScore

2.80

自引率

5.90%

发文量

期刊介绍： Research advances have contributed to improved outcomes across all specialties, but the rate of advancement in cardiology has been exceptional. Concurrently, the population of patients with cardiac conditions continues to grow and greater public awareness has increased patients" expectations of new drugs and devices. Future Cardiology (ISSN 1479-6678) reflects this new era of cardiology and highlights the new molecular approach to advancing cardiovascular therapy. Coverage will also reflect the major technological advances in bioengineering in cardiology in terms of advanced and robust devices, miniaturization, imaging, system modeling and information management issues.