関: vectorcardiogram

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/12/16 23:47:00」(JST)

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Vectorcardiography (sometimes abbreviated as VCG) is a method of recording the magnitude and direction of the electrical forces that are generated by the heart by means of a continuous series of vectors that form curving lines around a central point.^[1]

Vectorcardiography was developed by E. Frank in the early 1930s.^{[citation needed]} Since the human body is a three-dimensional structure, the basic idea is to construct three orthogonal leads containing all the electric information. The three leads are represented by right-left axis (X), head-to-feet axis (Y) and front-back (anteroposterior) axis (Z).

To calculate Frank’s leads X, Y and Z using the standard leads system, the following expressions^[2] are used:

X = -(-0.172 V1 - 0.074 V2 + 0.122 V3 + 0.231 V4 + 0.239 V5 + 0.194 V6 + 0.156 DI - 0.010 DII) (1)

Y = (0.057 V1 - 0.019 V2 - 0.106 V3 - 0.022 V4 + 0.041 V5 + 0.048 V6 - 0.227 DI + 0.887 DII) (2)

Z = -(-0.229 V1 - 0.310 V2 - 0.246 V3 - 0.063 V4 + 0.055 V5 + 0.108 V6 + 0.022 DI + 0.102 DII) (3)

There are different criteria how at to evaluate a vectorcardiogram created by various researchers. Grygoriy Risman presents these different methods, which were developed over half a century and offers an advanced approach called Spatial Vectorcardiometry (SVCM).^[3] The original Russian thesis is filed in the Odessa Medical Academy.^[4]

References

^ Merriam Webster Online. http://dev.m-w.com/medical/vectorcardiographic.
^ G Daniel, G Lissa, D Medina Redondo; et al. (2007). "Real-time 3D vectorcardiography: An application for didactic use". Journal of Physics: Conference Series 90 90.
^ Spatial Vectorcardiometry (Russian/English/German). http://www.vectorcardiometry.tk
^ Odessa Medical Academy. http://info.odmu.edu.ua/lib/catalog/47402

UpToDate Contents

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English Journal

Vectorcardiography shows cardiac memory and repolarization heterogeneity after ablation of accessory pathways not apparent on ECG.

Wecke L, Poçi D, Schwieler J, Johansson B, Edvardsson N, Lundahl G, Bergfeldt L.SourceDepartment of Cardiology, Karolinska University Hospital Solna, Karolinska Institutet, Stockholm, Sweden. liliane.wecke@karolinska.se
International journal of cardiology.Int J Cardiol.2013 Jun 5;166(1):152-7. doi: 10.1016/j.ijcard.2011.10.106. Epub 2011 Nov 9.
BACKGROUND: Pacing induced cardiac memory is an established phenomenon, but following successful WPW ablation, cardiac memory was present on ECG in variable proportions of patients depending on accessory pathway (AP) location. We hypothesized that vectorcardiography (VCG), which is more sensitive th
PMID 22078977

Instability of repolarization in LQTS mutation carriers compared to healthy control subjects assessed by vectorcardiography.

Vahedi F, Diamant UB, Lundahl G, Bergqvist G, Gransberg L, Jensen SM, Bergfeldt L.SourceDepartment of Molecular and Clinical Medicine/Cardiology, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. Electronic address: farzad.vahedi@vgregion.se.
Heart rhythm : the official journal of the Heart Rhythm Society.Heart Rhythm.2013 May 2. pii: S1547-5271(13)00509-2. doi: 10.1016/j.hrthm.2013.05.001. [Epub ahead of print]
BACKGROUND: Potassium channel dysfunction in congenital and acquired forms of long QT syndrome types 1 and 2 (LQT1 and LQT2) increases the beat-to-beat variability of the QT interval.OBJECTIVE: To study about the little known variability (instability) of other aspects of ventricular repolarization (
PMID 23643511

Regional myocardial wall thinning at multidetector computed tomography correlates to arrhythmogenic substrate in postinfarction ventricular tachycardia: assessment of structural and electrical substrate.

Komatsu Y, Cochet H, Jadidi A, Sacher F, Shah A, Derval N, Scherr D, Pascale P, Roten L, Denis A, Ramoul K, Miyazaki S, Daly M, Riffaud M, Sermesant M, Relan J, Ayache N, Kim S, Montaudon M, Laurent F, Hocini M, Haïssaguerre M, Jaïs P.SourceDepartment of Cardiac Electrophysiology, Hôpital Cardiologique du Haut-Lévêque and Université Victor Segalen Bordeaux II, Institut LYRIC, Equipex MUSIC, Bordeaux, France. yk.komat@gmail.com
Circulation. Arrhythmia and electrophysiology.Circ Arrhythm Electrophysiol.2013 Apr;6(2):342-50. doi: 10.1161/CIRCEP.112.000191. Epub 2013 Mar 10.
BACKGROUND: A majority of patients undergoing ablation of ventricular tachycardia have implanted devices precluding substrate imaging with delayed-enhancement MRI. Contrast-enhanced multidetector computed tomography (MDCT) can depict myocardial wall thickness with submillimetric resolution. We evalu
PMID 23476043

Japanese Journal

The 24th International Congress Electrocardiology (The 38th International Symposium on Vectorcardiography)

平岡昌和
心電図 = Electrocardiology 17(6), 747-749, 1997-11-01
NAID 10008116430

Comparison using dynamic vectorcardiography and MIBI SPECT of ST-segment changes and myocardial MIBI uptake during percutaneus transluminal coronary angioplasty of the left anterior descending coronary artery