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ICS11.020C05团 体 标 准T/CADERM9101—2023心磁图心肌缺血临床诊断要求Diagnosticrequirementsformagnetocardiogramofmyocardialischemiainclinicalapplication2023-03-20发布 2023-04-20实施中国医学救援协会 发布T/CADERM 9101-2023目 次言 Ι言 Ⅱ范围 1规性引文件 1术语定义 1缩语 2判要求 2分要求 3通则 3分级 3参考文献 10图1磁场方向 1图2磁场向量和电流向量 2图3偶极子磁场图 3图4判定0级 4图5判定1级 5图6判定2级 6图7判定3级 7图8判定4级 8表1心磁图定量指标及其正常参考值 2表20级定量指标 4表31级定量指标 5表42级定量指标 7表53级定量指标 8表64级定量指标 9T/CADERM 前 言GB/T1本文件由中国医学救援协会整合康复医学分会提出。本文件由中国医学救援协会标准化工作委员会归口。82本文件主要起草人:唐发宽、李俊峡、黄党生、曹雪滨、马东星、徐勇、杨清、李永乐、刘亚军、刘IT/CADERM9101T/CADERM9101—2023引 言心磁图(Magnetocardiogram或XIIT/CADERM9101T/CADERM9101—2023PAGEPAGE12心磁图心肌缺血临床诊断要求范围本文件界定了心磁图心肌缺血临床诊断的术语和定义,规定了判定要求和分级要求。规范性引用文件本文件没有规范性引用文件。术语和定义下列术语和定义适用于本文件。向 magneticfielddirection垂直于胸壁且向内的磁感应强度方向。注:磁场方向如图1箭头所示,也称为法线方向或Z方向。图1磁场方向量 magneticfieldvector在心磁图的心动周期中,随时间变化的综合电流向量在一定空间区域内产生的连续分布的向量场。注1:用磁感应强度来描述,用磁感线来表示。2图2 磁场向量和电流向量缩略语下列缩略语适用于本文件。TP_post:T波峰后磁场向量角度变化(T-wave Peak posterior)TP_pre:T波峰前磁场向量角度变化(T-wave Peak previous)T_CA:T波综合电流向量角度(T-waveCurrentAngle)T_CAD:T(T-waveCurrentAngleDiversity)T_CA_max:T(T-waveCurrentAnglemaximum)T_CA_min:T(T-waveCurrentAngleminimum)T_MA:T(T-waveMagneticAngle)T_MAD:T波磁场向量角度变化(T-waveMagneticAngleDiversity)T_MA_max:T波磁场向量最大角度(T-waveMagneticAnglemaximum)T_MA_min:T波磁场向量最小角度(T-waveMagneticAngleminimum)判定要求心磁图心肌缺血的临床诊断应基于定性指标和定量指标两项指标综合判定得出。定性指标应由心磁图的磁极结构形态、磁场向量,以及伪电流图(电流密度分布图)综合电流向量组成。11表1心磁图定量指标及其正常参考值单位为度序号指标最小值最大值1T_MA-85-452T_CA-5753TP_pre0404TP_post0405T_MAD0206T_MA_max100-357T_MA_min85-508T_CAD0209T_CA_max-108010T_CA_min-2055诊断结论应基于定性指标和定量指标得出,心磁图心肌缺血的临床诊断从轻到重分为如下级:0级,正常或大致正常;1级,轻度异常;2级,中度异常;3级,重度异常;4级,极重度或严重异常。如果定性分级和定量分级严重程度不一致时,诊断结论应依据两者中严重程度更重的给出判定。分级要求通则“+”(正极)“-”(负极)。磁场向量方向由“+”指向“-”,磁场向量大小,通过计算获取。角度(α)0°向开始,逆时针旋转是-180°~0°,顺时针旋转是0°~180°。在从T波早期部分到T波峰值的复极期间,参数被检验,作为心磁图参数的正常边界。健康者角度α范围是:-110°≥α≤20°,并且在30ms内旋转小于45°,否则为非健康者即心肌缺血患者。图3偶极子磁场图应根据定量指标项异常项数量依次进行分级。分级判定0级(α)综合电流向量(红色虚线箭头)方向指向右下,范围在-5°~75°4b)为例。0a) 心磁图 b) 伪电流图图4 判定0级心磁图定量指标中异常项数量为0,判定为0级,以表2例。20级定量指标单位为度序号指标正常范围实测值评价1T_MA-85~-45-53.12T_CA-5~7534.23TP_pre0~4024.84TP_post0~4022.85T_MAD0~2014.26T_MA_max-100~-35-47.57T_MA_min-85~-50-61.78T_CAD0~2015.79T_CA_max-10~8047.910T_CA_min-20~5532.2判定1级(α)5a)所示。方5°~75°5b)5d)为例。基于以上判定1级。a)心磁图 b)伪电流图 C)伪电流图 d)伪电流图图5判定1级心磁图定量指标中异常项数量为1项~3项判定1级,以表3例。31级定量指标单位为度序号定量指标正常范围实测值评价1T_MA-85~-45-102.1↓2T_CA-5~75-4.43TP_pre0~408.84TP_post0~4050.8↑5T_MAD0~2012.16T_MA_max-100~-35-93.87T_MA_min-85~-50-105.9↓8T_CAD0~206.49T_CA_max-10~800.710T_CA_min-20~55-5.8判定2级心磁图表现为一个偶极子心磁图模式,但正、负极区域边缘略不规整,磁场向量方向异常,角度(α)不在正常范围内,以图6a)为例。伪电流图双极环形结构(红色虚线圆形)面积大小不等,具有两个综合电流向量(红色虚线箭头)6b)为例;一个综合电流向量范围在-110°~-206c)为例。基于以上判定2级。 a)心磁图 b)伪电流图c)伪电流图图6判定2级心磁图定量指标中异常项数量为4项~6项判定2级,以表4为例。42级定量指标单位为度序号指标正常范围实测值评价1T_MA-85~-45-144.0↓2T_CA-5~75-58.2↓3TP_pre0~4010.04TP_post0~4015.35T_MAD0~2012.56T_MA_max-100~-35-135.0↓7T_MA_min-85~-50-147.5↓8T_CAD0~202.59T_CA_max-10~80-56.5↓10T_CA_min-20~55-59.0↓判定3级心磁图正、负极表现不明显,正极部分不完整,边缘不规整,且正、负极位置颠倒,磁场向量方向明显异常,角度(α)7a)为例。伪电流图具有两个以上的环状结构(红色虚线圆形),以图7b)为例;有两个明显环形结构,但是综合电流向量指向反向,以图7c)为例。基于以上判定3级。 心磁图 b)伪电流图c)伪电流图图7 判定3级心磁图定量指标中异常项数量为7项~9项判定3级,以表5为例。53级定量指标单位为度序号指标正常范围实测值评价1T_MA-85~-4559.0↑2T_CA-5~75143.8↑3TP_pre0~4028.04TP_post0~40100.7↑5T_MAD0~205.36T_MA_max-100~-3559.0↑7T_MA_min-85~-5053.7↑8T_CAD0~20285.0↑9T_CA_max-10~80145.7↑10T_CA_min-20~55-139.3↓判定4级伪电流图电流排列紊乱,分布在不同方向,以图8b)为例。基于以上判定4级。心磁图 b)伪电流图图8 判定4级心磁图定量指标中异常项数量为10项判定4级,以表6为例。64级定量指标单位为度序号指标正常范围实测值评价1T_MA-85~-4517.1↑2T_CA-5~75114.6↑3TP_pre0~40161.1↑4TP_post0~4043.7↑5T_MAD0~2038.1↑6T_MA_max-100~-3517.1↑7T_MA_min-85~-50-21.0↑8T_CAD0~2069.1↑9T_CA_max-10~80117.4↑10T_CA_min-20~5558.3↑参 考 文 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