When is the vectorcardiogram superior to the scalar electrocardiogram?

Chou, Te-Chuan

doi:10.1016/s0735-1097(86)80419-3

Cited by 54 publications

(18 citation statements)

References 82 publications

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“…The VCG has a greater sensitivity than the ECG in detecting atrial enlargements 4 and greater sensitivity and specificity than the ECG in the diagnosis of left ventricular enlargement (LVE). Abbott-Smith et al made vectorcardiograms in 100 patients carriers of LVE confirmed in the necropsy 5 and concluded that the VCG was capable of diagnosing 50% of the cases, with 11.7% of false positives.…”

Section: Vectormentioning

confidence: 99%

Significance of Vectorcardiogram in the Cardiological Diagnosis of the 21st Century

Pérez‐Riera

Uchida²,

Ferreira

et al. 2007

Clinical Cardiology

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SummaryUntil the mid-1980s, it was believed that the vectorcardiogram presented a greater specificity, sensitivity and accuracy in comparison to the conventional electrocardiogram, in the diagnosis of the different heart diseases. Recent studies revealed that the vectorcardiogram still is superior to the electrocardiogram in very specific situations, such as in the evaluation of electrically inactive areas, in intraventricular conduction disorders combined and/or in association to inactive areas, in the identification and location of ventricular preexcitation, in the differential diagnosis of patterns varying from normal of electrical axis deviation, in the evaluation of particular aspects of Brugada syndrome, and in the estimation of the severity of some enlargements, among others. With the advent of computerized vectorcardiography, a technology that improves the processing and recording method; a future still promising is expected for this methodology.In the fields of education and research, vectorcardiography provided a better and more rational insight into the electrical phenomena that occurs spatially, and represented an important impact on the progress of electrocardiography. Although a few medical centers still use the method as a routine, we hope that the use of this resource will not get lost over time, since vectorcardiography still represents a source to enrich science by enabling a better morphological interpretation of the electrical phenomena of the heart.

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Section: Vectormentioning

confidence: 99%

Significance of Vectorcardiogram in the Cardiological Diagnosis of the 21st Century

Pérez‐Riera

Uchida²,

Ferreira

et al. 2007

Clinical Cardiology

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“…Since the right ventricle (RV) has a lower mass than the left ventricle (LV) in both rats (5,21) and humans (22), RV electrical activity is largely masked by the LV electrical activity under normal conditions (28). We hypothesized that an increasing RV workload, elicited by progressive loss of pulmonary vasculature in PAH, would trigger a corresponding degree of RV hypertrophy, inducing threedimensional body surface ECG changes (7). We chose to investigate the evolution of three-dimensional body surface ECG abnormalities in a rat model of pulmonary hypertension.…”

mentioning

confidence: 99%

Early changes in rat hearts with developing pulmonary arterial hypertension can be detected with three-dimensional electrocardiography

Henkens

Mouchaers

Vliegen³

et al. 2007

American Journal of Physiology-Heart and Circulatory Physiology

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The study aim was to assess three-dimensional electrocardiogram (ECG) changes during development of pulmonary arterial hypertension (PAH). PAH was induced in male Wistar rats (n = 23) using monocrotaline (MCT; 40 mg/kg sc). Untreated healthy rats served as controls (n = 5). ECGs were recorded with an orthogonal three-lead system on days 0, 14, and 25 and analyzed with dedicated computer software. In addition, left ventricular (LV)-to-right ventricular (RV) fractional shortening ratio was determined using echocardiography. Invasively measured RV systolic pressure was 49 (SD 10) mmHg on day 14 and 64 (SD 10) mmHg on day 25 vs. 25 (SD 2) mmHg in controls (both P < 0.001). Baseline ECGs of controls and MCT rats were similar, and ECGs of controls did not change over time. In MCT rats, ECG changes were already present on day 14 but more explicit on day 25: increased RV electromotive forces decreased mean QRS-vector magnitude and changed QRS-axis orientation. Important changes in action potential duration distribution and repolarization sequence were reflected by a decreased spatial ventricular gradient magnitude and increased QRS-T spatial angle. On day 25, LV-to-RV fractional shortening ratio was increased, and RV hypertrophy was found, but not on day 14. In conclusion, developing PAH is characterized by early ECG changes preceding RV hypertrophy, whereas severe PAH is marked by profound ECG changes associated with anatomical and functional changes in the RV. Three-dimensional ECG analysis appears to be very sensitive to early changes in RV afterload.

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“…Edenbrandt L. et al also concluded that VCG proved to be more efficient than ECG for Superior AMI [6]. Te-Chuan Chou asserts that VCG provides better results in detection and diagnosis of atrial enlargements [7], by other hand, Abbott-Smith et al referring that VCG is better than ECG for left ventricular enlargement detection [8]. VCG also is superior to ECG in detection of ventricular chamber enlargement due to electrical inactive areas [9].…”

Section: B Vcg Versus Ecgmentioning

confidence: 99%

A portable spatial monitoring system for autonomous heart diagnosis

Meireles

Figueiredo

Lopes

2013

2013 IEEE 15th International Conference on E-Health Networking, Applications and Services (Healthcom 2013)

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Heart disorders are one of the most problematic issues of human health. There are currently many efforts to reduce the time for first assistance based on electronic systems that continuously records the electric heart activity for further inspection and anomalies detection. The most popular are portable monitoring systems based on the Electrocardiogram (ECG) signal. However, an efficient detection of heart problems still being a big challenge mainly due to the difficulty of accessing some specific cardiac problems and signal variations between different patients. A different technique for heart diagnosing is based on spatial recording of electrical heart activity, commonly known as Vectorcardiogram (VCG). VCG is pointed by several authors as a more efficient tool than ECG for heart inspection and problem detection. This research explores the possibility of using VCG signals in a portable device for constant heart monitoring and injuries detection. It is presented a portable solution with VCG recording and digital signal processing for automatic diagnosis. This paper covers the aspects of the VCG signal and its ability to be converted into a 12-lead ECG signal. It is also presented a system for automatic diagnosis based on VCG which is based on a multichannel portable hardware platform to support noise cancellation, parameter extraction and decision making algorithms.

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When is the vectorcardiogram superior to the scalar electrocardiogram?

Cited by 54 publications

References 82 publications

Significance of Vectorcardiogram in the Cardiological Diagnosis of the 21st Century

Significance of Vectorcardiogram in the Cardiological Diagnosis of the 21st Century

Early changes in rat hearts with developing pulmonary arterial hypertension can be detected with three-dimensional electrocardiography

A portable spatial monitoring system for autonomous heart diagnosis

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