Expression of atrial depolarization on the body surface

Roshchevsky, M. P.; Chudorodova, S. L.; Roshchevskaya, I. M.

doi:10.1134/s001249660701005x

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…This results in changes to the total picture of excitation propagation along the atria. In normotensive rats, the excitation wave spreads unidirectionally along the epicardium in pulmonary venous return to the left atrium (5).…”

Section: Discussionmentioning

confidence: 99%

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Comparison of propagation of atrial excitation with the cardiopotential distribution on the body surface of hypertensive rats

Smirnova¹,

Иванова²,

Al³

et al. 2012

Anadolu Kardiyol Derg

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Objective: Arterial hypertension is associated with the risk of developing atrial arrhythmia. This research was aimed at studying the sequence of depolarization along the atrial epicardium and formation of the cardioelectric field on the body surface of hypertensive rats. Methods: The study was carried out on eleven ISIAH rats (with hereditary stress-induced hypertension). We analyzed spatial-temporal characteristics of body surface potential map (BSPM), time characteristics of electrocardiogram during atrial depolarization, sequence of atrial epicardial depolarization of rats. Statistical analysis was performed using independent samples t-test. Results: The results indicated that in 27% of hypertensive rats in the pulmonary vein (PV) sleeves, early excitation areas are formed 2.0±0.5 ms after the beginning of depolarization of the sino-atrial node area, in 73% of animals, the area of the PV sleeves is excited 6.5±0.4 ms after the beginning of depolarization. In experimental animals, the beginning of inversion of areas of positive and negative cardioelectric potentials on BSPM does not differ. In 73% of rats, duration of inversion on BSPM was 7.7±1.9 ms, and in 27% -3.9±0.1 ms (p=0.011). The formation of early activation zones in PV of rats with arterial hypertension testifies to possible wandering focus in the myocardium of PV sleeves. Stress-induced hypertension results in actual risk of atrial arrhythmias, which originate at the base of the PV. Conclusion: In rats with arterial hypertension, two early depolarization zones are revealed in the sinus node area and in the PV return to the left atrium, projected on BSPM by mutual positions of negative and positive potential zones. (Anadolu Kardiyol Derg 2012; 12: 195-9) Key words: Atrial depolarization, body surface potential map, epicardium, stress-induced arterial hypertension, rats 195ÖZET Amaç: Arteryel hipertansiyon, atriyal aritmi gelişme riski ile bağlantılıdır. Bu araştırma, hipertansif sıçanların vücut yüzeyinde kalp elektrik alan oluşumu ve atriyal epikardiyum boyunca depolarizasyon sırasını çalışmayı amaçlamıştır. Yöntemler: Çalışma on bir (kalıtsal stres kaynaklı hipertansiyonu) sıçan üzerinde gerçekleştirilmiştir. Sıçanların atriyal epikardiyal depolarizasyon dizisi, atriyal depolarizasyon sırasında elektrokardiyogram II derivasyon zaman özellikleri, vücut yüzeyi potansiyel haritası (VYPH)'nın spasyal-temporal özelliklerini analiz ettik. İstatistiksel analiz, bağımsız örneklem t-testi kullanarak yapıldı. Bulgular: Sonuçlar, hipertansif sıçanların %27'sinde pulmoner ven (PV) dallarında sino-atriyal düğüm alanının depolarizasyonu başladıktan sonra 2.0±0.5 ms'da erken uyarım alanları oluştuğunu, hayvanların %73'ünde, depolarizasyon başladıktan sonra 6.5±0.4ms'da PV dal alanlarında uyarım olduğunu gösterdi. Deney havyalarında, VYPH'de negatif ve pozitif kardiyopotansiyel alanlarının inversiyon başlangıcı farklı değildir. Sıçanların %73'ünde, VYPH inversiyon süresi 7.7±1.9 ms, %27'inde 3.9±0.1 ms'e alır (p=0.011). Arteryel hipertansiyonlu sıçanla...

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Section: Discussionmentioning

confidence: 99%

“…The ECG in standard leads is not informative enough for estimating initial phase of atrial depolarization (4). Recordings and analyses of the cardioelectric field on the body surface reveal electrical atrial activity during early depolarization, prior to the formation of the P-wave in the ECG II (5).…”

Section: Introductionmentioning

confidence: 99%

Comparison of propagation of atrial excitation with the cardiopotential distribution on the body surface of hypertensive rats

Smirnova¹,

Иванова²,

Al³

et al. 2012

Anadolu Kardiyol Derg

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“…Решение обратной задачи электрокардиологии [15] показало возможность неинвазивной идентификации источников фибрилляции и нестабильных роторов в лакунах легочных вен [16]. При использовании систем картирования электрического поля сердца, рассчитывающих последовательность деполяризации предсердий по зарегистрированным на поверхности тела реальным данным, имеются ограничения в выявлении процессов в межпредсердной перегородке из-за маленькой амплитуды кардиоэлектрических потенциалов [17].…”

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Non-invasive detection of arrhythmogenic foci of atria by using the cardioelectric field on the surface of the body during experimental pulmonary hypertension

Smirnova

Suslonova

Рощевская

2020

Vestnik aritmologii

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Aim. The potential distribution of the cardioelectric field on the body surface during the initial atrial activity and the sequence of depolarization of the atrial subepicardium in rats with experimentally induced pulmonary hypertension were compared. This work is devoted to non-invasive detection of arrhythmogenic foci of atria by using the cardioelectric field on the body surface during experimental pulmonary hypertension.Materials and methods. The method of cardioelectrochronotopography has been used to study the electric field of the heart on the body surface and the sequence of propagation of the excitation wave along the atrial epicardium in rats with experimentally induced pulmonary hypertension caused by a single injection of monocrotaline (60 mg / kg, four weeks after drug administration).Results. Pulmonary hypertension causes the appearance of an additional focus of initial excitation in the area of the pulmonary vein lacunae, which leads to an increase in the heterogeneity of the propagation of the excitation wave along the atrial epicardium. The appearance of the additional excitation focus in the mouths of the pulmonary veins in the left atrium changes the picture of the sequence of depolarization of the atrial epicardium. The heterogeneity of the propagation of the excitation wave along the atrial epicardium is reflected in a different arrangement of zones of positive and negative cardioelectric potentials on the body surface before and during the P-wave in comparison with the initial state.Conclusion. Induced pulmonary hypertension contributes to the appearance of an additional focus of initial excitation in the area of the sleeves of the pulmonary veins of the left atrium in rats. This leads to an increase in the heterogeneity of the propagation of the excitation wave along the atrial epicardium. This is also reflected in the change in the arrangement of the zones of positive and negative cardioelectric potentials on the body surface before and during the P-wave in comparison with the initial state.

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Cardioelectrical field on the body surface of newborn nestlings of the pied flycatcher (Ficedula hypoleuca) at the period of initial atrial activity

Smirnova

Roshchevskaya

Roshchevsky

2014

J Evol Biochem Phys

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Expression of atrial depolarization on the body surface

Cited by 3 publications

References 7 publications

Comparison of propagation of atrial excitation with the cardiopotential distribution on the body surface of hypertensive rats

Comparison of propagation of atrial excitation with the cardiopotential distribution on the body surface of hypertensive rats

Non-invasive detection of arrhythmogenic foci of atria by using the cardioelectric field on the surface of the body during experimental pulmonary hypertension

Cardioelectrical field on the body surface of newborn nestlings of the pied flycatcher (Ficedula hypoleuca) at the period of initial atrial activity

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