Vereckei新四步流程法鉴别诊断宽QRS波群心动过速的临床价值

目的探讨Vereckei新四步流程法鉴别诊断宽QRS波群心动过速(WCT)的临床价值。方法回顾性分析157例WCT发作时12导联同步心电图特征,采用Vereckei新四步流程法观察其aVR导联QRS波群形态,测量QRS波的Vi/Vt值,进行分析判断,对比电生理检查结果,计算其对室性心动过速(室速,VT)诊断的敏感性、特异性及准确率。结果 157例WCT,经食道心房调搏、心内电生理检查及射频消融术确诊108例为VT,49例为室上速。采用Vereckei新四步法鉴别诊断时共有114例诊断为室速,114例经食道心房调搏、心内电生理检查及射频消融术确诊102例为VT,12例为SVT。其对VT诊断的敏感性94.4%,特异性75.5%,准确率为88.5%。VT组心电图aVR导联起始部为R波,起始为r波或q波时的时限40ms,以QS波为主波时前降支部分有顿挫及QRS波的Vi/Vt值≤1的发生率明显高于室上性心动过速(室上速,SVT)组,两者差异有统计学意义(P0.05)。结论 Vereckei新四步流程法用于鉴别诊断WCT,具有敏感性强、简单方便、准确的优点,尤其适用于临床紧急情况,对WCT的急诊处理、病情预后及治疗策略的选择具有较高的临床应用价值。     

三种宽QRS波心动过速鉴别流程的对比研究

目的 探讨aVR单导联四步法、室速积分法、肢体导联流程(LLA)诊断宽QRS心动过速的临床价值.方法 选取41例宽QRS心动过速患者发作时的体表12导联心电图,并经心内电生理检查证实心动过速性质,由两位心电图医师分别用三种鉴别流程进行诊断,对比三种方法诊断室速(VT)的敏感度、特异度、准确性、约登指数及一致性.结果 a...     

三种流程法联用诊断宽QRS波心动过速3例

联合应用Brugada四步流程、Vereckei四步法、aVR单导联四步法等对3例宽QRS波心动过速心电图进行鉴别诊断,均诊断为室速。经针对性治疗,3例患者心电图均转复为窦性心律。提示临床中联合采用多种方法诊断,对宽QRS波心动过速心电图能快速准确诊断。     

QRS波第一峰时限与aVR导联四步法诊断宽QRS波心动过速的分析

宽QRS波心动过速(WCT)指QRS时间≥0.12 s、频率＞100次/min的心动过速[1].室性和室上性心动过速心电图上都可表现为宽QRS波群,两者电生理机制、诊断、治疗不同,因此,对宽QRS波心动过速的鉴别诊断十分重要.依据体表12导联心电图鉴别宽QRS波心动过速是临床常用方法,已开展的有Brugada四步法、Vereckei五步法及aVR导联四步法.2010年Luis提出通过心电图Ⅱ导联测量QRS波第一峰时限(R-wave peak time,RWPT)[2](新方法)来鉴别宽QRS波心动.本研究应用新方法和aVR导联四步法对395份动态心电图记录的宽QRS波心动过速进行了回顾性分析,比较两种方法鉴别WCT的优劣,现将结果报告如下.     

单导联鉴别宽QRS波心动过速的临床分析

目的分析单导联心电图对宽QRS波心动过速(WCT)的鉴别价值。方法对经心内电生理检查或射频消融治疗而明确诊断的WCT患者,研究aVR导联四步法和Ⅱ导联R波峰时限(RWPT)测定对WCT诊断的准确率。结果 149例WCT患者中,107例室性心动过速(VT),42例室上性心动过速(SVT)。应用aVR导联四步法正确诊断136例,准确率91.27%,敏感性95.33%,特异性80.95%,阳性预测值92.73%,阴性预测值87.18%;应用Ⅱ导联RWPT法,124例得到正确诊断,准确率83.22%,敏感性为80.05%,特异性为78.57%,阳性预测值91%,阴性预测值67.35%,其中左室特发性室速(ILVT)和房扑误诊较高。结论 aVR导联四步法和Ⅱ导联RWPT均可正确鉴别大部分WCT,但对ILVT与房扑存在明显的误诊。     

Vereckei四步法在宽QRS波心动过速鉴别诊断中的应用

目的:分析Vereckei四步法在宽QRS波心动过速(WCT)鉴别诊断中的应用价值.方法:应用Vereckei四步法对113例WCT患者的12导联体表心电图进行分析.观察Vereckei四步法对WCT鉴别的准确性,计算Vereckei四步法的准确率、特异度和敏感度,评价其实用性.结果:入选113例WCT患者,室上性心动过速(SVT)31例,室性心动过速(VT)82例.Vereckei四步法与Brugada四步法比其准确率(87.6%vs.76.1%,P=0.006)、敏感度(86.6%vs.76.8%,P=0.004)和特异度(90.3%vs.74.2%,P=0.024)差异均有统计学意义.结论:Vereckei四步法对WCT中的VT的诊断具有较好的敏感度和特异度,同Brugada四步法相比,具有简便易行的特点和较好的临床应用价值.     

aVR导联及Vi/Vt比值对宽QRS心动过速鉴别诊断的价值

目的 探讨aVR导联及Vi/Vt比值对宽QRS心动过速(WCT)的鉴别诊断价值.方法 采用12导联同步动态心电图,记录120例141阵次节律规整的WCT,以WCT时的QRS波形态与窦性心律时的室性期前收缩形态相同,连续出现3次以上诊断为室性心动过速(VT),将其分为VT组:74例95阵;室上性心动过速(SVT)组:46例.根据流程aVR导联QRS波形态出现:①起始R波;②起始r波或q波>40 ms;③起始负向、主波向下的QRS波下降支出现顿挫,即为VT.若没有上述表现,观测Vi/Vt比值,即从QRS波始点后移40ms处测量其电压绝对值为Vi,从QRS波终点前移40ms处测量其电压绝对值为Vt,Vi/Vt>1为SVT,Vi/Vt≤1为VT.结果 aVR导联QRS波形态出现上述心电图表现及Vi/Vt≤1的发生率VT组明显高于SVT组,差异有统计学意义(P<0.05).其对VT的预测价值敏感性为94.74%,特异性为80.43%,准确性为90.07%.结论 以aVR导联及Vi/Vt比值为主鉴别WCT的流程,具有简便、快捷、敏感及准确的优点,适用于临床紧急情况的处理,可作为其他鉴别诊断方案的重要补充,有较高的临床诊断价值.     

Q RS波第一峰时限联合aVR单导联法对宽QRS波心动过速的鉴别诊断价值

目的 探讨Ⅱ导联QRS波第一峰时限(R-wave peak time,RWPT)与aVR导联QRS波初始R波法联合应用对宽QRS波心动过速(wide QRS complex tachycardia,WCT)的鉴别诊断价值.方法 回顾性分析已确诊的132例室性心动过速(ventricular tachycardia,VT)和33例室上性心动过速(supraventricular tachycardia,SVT)患者的心电图形态特征,测量心电图的Ⅱ导联RWPT并观察aVR导联初始波是否为R波,检测应用该方法诊断VT的灵敏度、特异度、准确率、阳性预测值及阴性预测值,并将其结果与RWPT诊断方法进行比较分析.结果 运用RWPT结合aVR导联QRS波初始R波法诊断VT的灵敏度96.97%,特异度72.73%,准确度92.12%,阳性预测值93.43%,阴性预测值85.71%;与运用RWPT方法比较,灵敏度、准确度及阴性预测值均显著提高(P<0.05).结论 运用RWPT结合aVR导联QRS波初始R波法对WCT的鉴别诊断具有较高的灵敏度与准确度,而且简便快捷,更加适用于急诊WCT的鉴别诊断.     

AVR导联四步法和Ⅱ导联RWPT法对宽QRS波群心动过速鉴别诊断结果分析

目的探讨AVR导联四步法和Ⅱ导联RWPT法鉴别诊断宽QRS波群（WCT）心动过速的价值。方法101例12导联动态心电图检查记录到WCT的患者,根据心电图表现及临床资料综合判断诊断为室速56例,室上速45例。由2名不知确诊结果的心电图医师分别采用avR导联四步法及Ⅱ导联RWPT法进行诊断并与临床诊断结果比较。结果 avR导联四步法诊断准确率及对室速诊断的敏感度、特异性均明显高于Ⅱ导联RWPT法（P均〈0.005）。结论 AVR导联四步法和Ⅱ导联RWPT法均可对WCT做出相对准确的判断,但AVR导联四步法明显优于Ⅱ导联RWPT法。     

心电图Ⅱ导联QRS波第一峰时限对宽QRS波心动过速鉴别诊断价值研究

目的探讨Ⅱ导联QRS波第一峰时限(RWPT)对宽QRS波心动过速(WCT)的鉴别诊断价值。方法回顾性分析2008年1月至2012年7月广州医科大学附属第二医院心内科收治的156例WCT患者心电图,其中室性心动过速120例,室上性心动过速36例。由2名医师采用Ⅱ导联RWPT法、Verekei四步法及aVR导联四步法进行分析,分别计算比较三种方法的准确率、敏感度和特异度。结果Ⅱ导联RWPT法诊断准确率及敏感度均比Verekei四步法及aVR导联四步法明显降低(均P0.05),而特异度与Verekei四步法比较差异无统计学意义(P0.05),与aVR导联四步法比较明显降低(P0.05)。结论Ⅱ导联RWPT法诊断WCT准确率、敏感度及特异度均不高,但方法简单易掌握,具有一定的临床实用价值。     

Specificity of the wide QRS complex tachycardia algorithms in recipients of cardiac resynchronization therapy

BackgroundWe assessed the specificity of wide QRS complex tachycardia (WCT) differentiating algorithms in patients with preexistent left bundle branch block (LBBB) and heart failure.MethodsThree hundred fourteen patients with resynchronization devices were retrospectively screened. electrocardiograms with supraventricular LBBB rhythm were used as a surrogate for supraventricular tachycardia QRS morphology. The Pava lead II criterion, ventricular activation velocity ratio (Vi/Vt) ratio in V₂, Vereckei aVR, Brugada, Griffith, and Bayesian algorithms were investigated.ResultsThe WCT algorithms had a lower specificity (33%-69%) in patients with LBBB than in general WCT populations. The Pava lead II criterion and Brugada algorithm had higher specificity than other algorithms (P < .05). Several of the single criteria (absence of an RS complex in V₁ through V₆, initial R wave in aVR, Vi/Vt < 1 in V₂) had specificities of 92% to 99%.ConclusionsIn patients with heart failure and LBBB, an electrocardiographic diagnosis of ventricular tachycardia should be based on selected, specific criteria rather than on WCT algorithms.     

单导联对宽QRS波鉴别诊断价值的应用

目的 验证应用Ⅱ导联QRS波第1峰时限(RWPT)、aVR导联形态及Vi/Vt比值对宽QRS波的鉴别诊断价值。方法 回顾性分析已明确诊断的261例室性早搏及127例房性早搏伴心室内差异传导患者12导联体表心电图的Ⅱ导联RWPT、aVR导联形态及Vi/Vt比值,比较3种方法鉴别诊断宽QRS波形早搏的敏感度、特异度、阳性预测值、阴性预测值、准确度,并比较aVR导联形态法前3步的鉴别价值。结果 ①Ⅱ导联RWPT、aVR导联形态法鉴别宽QRS波差异无统计学意义(P>0.05),均有较高的准确度、敏感度、特异度、阳性预测值;Vi/Vt比值法与其余两种方法相比准确度、敏感度较低(P<0.05),特异度、阳性预测值较高(P<005)。②应用aVR导联形态法第1步、第3步有较高的特异度,第3步有较高的阳性预测值。结论 鉴别诊断宽QRS波时,Ⅱ导联RWPT、aVR导联形态法较Vi/Vt比值法诊断价值高,且具有简便、快捷、准确的优点。     

Electrocardiogram algorithms used to differentiate wide complex tachycardias demonstrate diagnostic limitations when applied by non-cardiologists

Aims

Non-cardiologists (NCs) are often responsible for the preliminary diagnosis and early management of patients presenting with ventricular tachycardia (VT) or supraventricular wide complex tachycardia (SWCT). At present, the Vereckei aVR and Brugada algorithms are the most widely recognized and frequently relied upon wide complex tachycardia (WCT) differentiation criteria by NCs. This study aimed to determine the diagnostic efficacy of the Vereckei aVR and Brugada algorithms when applied by NCs.

Application of a new algorithm in the differential diagnosis of wide QRS complex tachycardia.

AIMS: The Brugada criteria proposed to distinguish between regular, monomorphic wide QRS complex tachycardias (WCT) caused by supraventricular (SVT) and ventricular tachycardia (VT) have been reported to have a better sensitivity and specificity than the traditional criteria. By incorporating two new criteria, a new, simplified algorithm was devised and compared with the Brugada criteria. METHODS AND RESULTS: A total of 453 WCTs (331 VTs, 105 SVTs, 17 pre-excited tachycardias) from 287 consecutive patients with a proven electrophysiological (EP) diagnosis were prospectively analysed by two of the authors blinded to the EP diagnosis. The following criteria were analysed: (i) presence of AV dissociation; (ii) presence of an initial R wave in lead aVR; (iii) whether the morphology of the WCT correspond to bundle branch or fascicular block; (iv) estimation of initial (v(i)) and terminal (v(t)) ventricular activation velocity ratio (v(i)/v(t)) by measuring the voltage change on the ECG tracing during the initial 40 ms (v(i)) and the terminal 40 ms (v(t)) of the same bi- or multiphasic QRS complex. A v(i)/v(t) >1 was suggestive of SVT and a v(i)/v(t) 相似文献   

Validação de um Algoritmo Simples para Detecção de Taquicardia Ventricular no Eletrocardiograma

BackgroundThe differential diagnosis of wide QRS complex tachycardia (WCT) between ventricular tachycardia (VT) or supraventricular tachycardia with aberrant conduction (SVT-A) is sometimes difficult in the emergency room.ObjectiveThe aim of this study was to evaluate the accuracy of a new simple electrocardiographic algorithm to recognize VT in patients with wide complex tachycardia.MethodsThe 12-lead electrocardiograms (ECG) for WCT were prospectively obtained from 120 patients during electrophysiological study. Six physicians with different expertise analyzed the electrocardiographic recordings, and made the diagnosis based on the D12V16 algorithm, that involves the analysis of the predominant polarity of QRS in leads I, II, V1 and V6. The diagnosis was compared with that made using the traditional Brugada algorithm and the “gold-standard” electrophysiological study. Statistical analyses were performed with a significance level of 5% (p<0.05).ResultsAccording to the EPS study, 82 ECG recordings were VT and 38 SVT-A. Structural heart diseases were present in 71 (86.6%) patients with VT and in 8 (21.1%) with SVT-A. The Brugada algorithm had higher global sensitivity (87.2%), and the D12V16 algorithm had higher global specificity (85.1%) for VT. Both D12V16 and Brugada’s algorithms presented a high positive predictive value (90.9% vs 85.8%, respectively) and similar accuracy (73.8% vs 81.4%, respectively) for the diagnosis of VT. Experienced evaluators were more accurate using Brugada algorithm than the D12V16 algorithm, but the accuracy of both algorithms was similar according to less experienced examiners.ConclusionThe simplified algorithm may be a useful method to recognize VT in the ECG, especially for less experienced doctors. (Arq Bras Cardiol. 2021; [online].ahead print, PP.0-0)     

New algorithm using only lead aVR for differential diagnosis of wide QRS complex tachycardia.

BACKGROUND: We recently reported an ECG algorithm for differential diagnosis of regular wide QRS complex tachycardias that was superior to the Brugada algorithm. OBJECTIVE: The purpose of this study was to further simplify the algorithm by omitting the complicated morphologic criteria and restricting the analysis to lead aVR. METHODS: In this study, 483 wide QRS complex tachycardias [351 ventricular tachycardias (VTs), 112 supraventricular tachycardias (SVTs), 20 preexcited tachycardias] from 313 patients with proven diagnoses were prospectively analyzed by two of the authors blinded to the diagnosis. Lead aVR was analyzed for (1) presence of an initial R wave, (2) width of an initial r or q wave >40 ms, (3) notching on the initial downstroke of a predominantly negative QRS complex, and (4) ventricular activation-velocity ratio (v(i)/v(t)), the vertical excursion (in millivolts) recorded during the initial (v(i)) and terminal (v(t)) 40 ms of the QRS complex. When any of criteria 1 to 3 was present, VT was diagnosed; when absent, the next criterion was analyzed. In step 4, v(i)/v(t) >1 suggested SVT, and v(i)/v(t) < or =1 suggested VT. RESULTS: The accuracy of the new aVR algorithm and our previous algorithm was superior to that of the Brugada algorithm (P = .002 and P = .007, respectively). The aVR algorithm and our previous algorithm had greater sensitivity (P <.001 and P = .001, respectively) and negative predictive value for diagnosing VT and greater specificity (P <.001 and P = .001, respectively) and positive predictive value for diagnosing SVT compared with the Brugada criteria. CONCLUSION: The simplified aVR algorithm classified wide QRS complex tachycardias with the same accuracy as standard criteria and our previous algorithm and was superior to the Brugada algorithm.     

宽QRS波心动过速的诊治进展

宽QRS波是临床常见的心律失常,常分为室性心动过速和室上性心动过速,由于两者治疗原则及方法不相同,所以鉴别宽QRS波心动过速非常重要,现介绍Brugada法、Vereckei法、aVR法、Ⅱ导联R波峰值标准法以及各种方法的特异性及敏感性。对于不同类型的宽QRS波心动过速有着不同的治疗方法,如药物、电复律及射频消融术。     

单独用aVR导联鉴别诊断宽QRS波心动过速——附200份心电图分析

目的:应用Verecki新提出的单独运用aVR导联新法则对宽QRS 波心动过速进行鉴别诊断,评价其敏感性、特异性、阳性预测值、阴性预测值及诊断符合率.方法:选择200份经电生理检查诊断明确的宽QRS 波心动过速的心电图,采用单盲法由2位研究人员运用aVR导联新法则进行回顾性分析,并进行一致性检验后,统计aVR导联新法则每一步的诊断情况,计算敏感性、特异性、阳性预测值,阴性预测值及诊断符合率.结果:运用aVR导联新法则诊断的敏感性为97.6%,特异性为 67.7%,阳性预测值94.3%,阴性预测值为84.0%,诊断符合率为93.0%,对左室特发性室速的误诊例数为0.结论:单独运用aVR导联进行诊断具有高效准确,特别适合左室室速的鉴别诊断,适合临床应用.     

Are wide complex tachycardia algorithms applicable in children and patients with congenital heart disease?

Introduction

Several algorithms have been developed to help determine the etiology of wide complex tachycardias (WCTs) in adults. Sensitivity and specificity for differentiating supraventricular tachycardia (SVT) with aberration from ventricular tachycardia (VT) in adults have been demonstrated to be as high as 98% and 97%. These algorithms have not been tested in the pediatric population. We hypothesize that these algorithms have lower diagnostic accuracy in children and patients with congenital heart disease.

Methods

A retrospective review of the pediatric electrophysiology database at Stanford from 2001 to 2008 was performed. All children with WCT, a 12-lead electrocardiogram (ECG) available for review, and an electrophysiology study confirming the etiology of the rhythm were included. Patients with a paced rhythm were excluded. The ECGs were analyzed by 2 electrophysiologists blinded to the diagnosis according to the algorithms described in Brugada et al,² and Vereckei et al.⁵ Additional ECG findings were recorded by each electrophysiologist.

Results

A total of 65 WCT ECGs in 58 patients were identified. Supraventricular tachycardia was noted in 62% (40/65) and VT in 38% (25/65) of the ECGs. The mean age was 13.5 years (SD ± 5.1), the mean weight was 51.8 kg (SD ± 22.4), and 48% (31/65) were male. The mean tachycardia cycle length was 340 milliseconds (SD ± 95). Congenital heart disease (CHD) was present in 37% (24/65) of patients (7 tetralogy of Fallot, 6 Ebstein's, 4 double-outlet right ventricle, 3 complex CHD, 2 d-transposition of great arteries, 1 status-post orthotopic heart transplantation, 1 ventricular septal defect). The Brugada algorithm correctly predicted the diagnosis 69% (45/65) of the time, the Vereckei algorithm correctly predicted the diagnosis 66% (43/65) of the time, and the blinded reviewer correctly predicted the diagnosis 78% (51/65) of the time. There was no difference in the efficacy of the algorithms in patients with CHD vs those with structurally normal hearts. The findings of left superior axis deviation (P < .01) and a notch in the QRS downstroke of V₁ or V₂ (P < .01) were more common in VT than SVT, whereas a positive QRS deflection in V₁ (P = .03) was more commonly present in SVT than VT.

Conclusion

The Brugada and Vereckei algorithms have lower diagnostic accuracy in the pediatric population and in patients with congenital heart disease than in the adult population. Left superior axis deviation and a notch in the QRS downstroke were more commonly associated with VT, whereas a positive QRS deflection in V₁ was more commonly associated with SVT in this population.