DIAGNOSTICS OF CHRONIC HEART FAILURE BY THE DURATION OF VENTRICULAR SYSTOLE

Authors

  • Yurii S. Malov Kirov Military Medical Academy, 6, ul. Academica Lebedeva, St. Petersburg, 194044, Russian Federation
  • Aleksandra M. Malova St. Petersburg State University, 7–9, Universitetskaya nab., St. Petersburg, 199034, Russian Federation

DOI:

https://doi.org/10.21638/11701/spbu11.2017.401

Abstract

The objective of the study was to investigate systolic duration on the basis of the QT interval in an ECG. We observed 246 coronary heart disease and hypertensive patients. 134 of them had a functional stress test for revealing latent heart failure. Systolic duration reflects ventricular contractile function.The difference between the values in the actual QT interval and the one corrected for the heart rate is indicative of myocardial contractile dysfunction and heart failure. We have found ventricular systole elongation in patients’ ECGs, which expressly depends on heart failure severity. Functional stress tests help to reveal that in the event of asymptomatic chronic heart failure. They cause the QT interval prolongation, and therefore, contractile dysfunction of the ventricles. So, heart failure is based on contractile dysfunction of the cardiac muscle. Refs 19. Tables 2.

Keywords:

systole, QT interval, myocardial contractility, heart failure, stress tests

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References


References

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Вестник Санкт-Петербургского университета. Медицина

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Published

2017-12-05

How to Cite

Malov, Y. S., & Malova, A. M. (2017). DIAGNOSTICS OF CHRONIC HEART FAILURE BY THE DURATION OF VENTRICULAR SYSTOLE. Vestnik of Saint Petersburg University. Medicine, 12(4), 307–313. https://doi.org/10.21638/11701/spbu11.2017.401

Issue

Vol. 12 No. 4 (2017)

Section

Internal medicine

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Articles of "Vestnik of Saint Petersburg University. Medicine" are open access distributed under the terms of the License Agreement with Saint Petersburg State University, which permits to the authors unrestricted distribution and self-archiving free of charge.