Comparison of the integral indices of the vectorcardiogram with the data of echocardiography in patients with idiopathic and chronic thromboembolic pulmonary hypertension


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Abstract

The aim of the work is to compare vectorcardiographic (VCG) variables - spatial QRS-T angle and electrocardiographic ventricular gradient (VG) with echocardiography (EchoCG) data in patients with idiopathic pulmonary hypertension (IPH) and chronic thromboembolic pulmonary hypertension (CTEPH). Materials and methods. In 40 patients with IPH and 40 patients with CTEPH at the age of 45±12 years, systolic pulmonary artery pressure (SPAP); the sizes of heart chambers, parameters of RV systolic and diastolic function were evaluated with EchoCG. The QRS-T and VG angles were calculated on the VCG, derived from 12-lead digital ECG. Results. In all patients SPAP was greater than 40 mm Hg (mean 83±18 mm Hg), EchoCG data indicated hypertrophy and dilatation of RV, its systolic and diastolic function; dilatation of the right atrium (RA). Prognostically unfavorable changes in EchoCG were observed: the presence of pericardial effusion in 35 (44%) patients, RA area greater than 26 cm2 in 18 (23%) patients; TAPSE less than 1.5 cm in 37 (46%) patients. EchoCG and VCG variables had statistically significant differences in patients with III-IV functional class in comparison with I-II functional class. Statistically significant moderate correlations between VCG and EchoCG variables were revealed. VCG variables allowed to separate patient groups with the presence and absence of prognostically unfavorable changes in EchoCG with sensitivity from 54 to 78% and specificity from 66 to 87%. Conclusion. In patients with IPH and CTEPH, changes of QRS-T angle and VG correlate with SPAP, the size of RV and RA, parameters of RV systolic and diastolic function. The possibility of the use of QRS-T angle and VG for the detection of patients with prognostically unfavorable echocardiographic changes in the general group of patients with IPH and CTEPH has been shown.

About the authors

T A Sakhnova

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

Email: tamara-sahnova@mail.ru
к.м.н., с.н.с. отд. новых методов диагностики; ORCID: 0000-0002-5543-7184 Moscow, Russia

E V Blinova

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

Email: 2009.73@mail.ru
к.м.н., н.с. лаб. ЭКГ; ORCID: 0000-0001-8725-7084 Moscow, Russia

A A Belevskaya

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

к.м.н., м.н.с. отд. ультразвуковых методов исследования Moscow, Russia

M A Saidova

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

д.м.н., проф., руководитель отд. ультразвуковых методов исследования Moscow, Russia

O A Arkhipova

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

к.м.н., н.с. отд. легочной гипертензии и заболеваний сердца Moscow, Russia

E S Yurasova

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

к.м.н., в.н.с. организационно-методического отд. Moscow, Russia

F H Alokova

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

лаборант-исследователь лаб. ЭКГ Moscow, Russia

T V Martynyuk

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

д.м.н., руководитель отд. легочной гипертензии и заболеваний сердца Moscow, Russia

I Ye Chazova

A.L. Myasnikov Research Institute of Cardiology of National Medical Research Center of Cardiology of the Ministry of Health of the Russian Federation

акад. РАН, д.м.н., проф., директор, руководитель отд. гипертонии; ORCID: 0000-0002-9822-4357 Moscow, Russia

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