Alternation of the QRS complex - new or well-forgotten old? Clinical observations
L. M. Makarov,
V. N. Komoliatova,
D. A. Besportochnyi,
A. G. Akopyan,
E. V. Zaklyazminskaya,
I. I. Kiseleva https://doi.org/10.35336/VA-1545
Abstract
Three cases of registration of a rare electrocardiographic (ECG) phenomenon - alternation of the QRS complex (AQRS) are presented. AQRS was detected in two girls aged 6 and 16 with third variant of long QT syndrome (LQT3) and in an asymptomatic patient aged 13 with a family history of sudden death at a young age. AQRS was recorded in combination with macroscopic alternans of the T wave during Holter monitoring and bicycle ergometry. A definition of AQRS is given and possible mechanisms and clinical significance of the detected ECG phenomenon are discussed.
Keywords
QRS alternans,
long QT syndrome,
LQT3,
sudden cardiac death,
mechanical and electrical cardiac alternans,
Holter monitoring,
bicycle ergometry
Supporting agencies: none
About the Authors
L. M. Makarov
FSBI “FSCC for Children and Adolescents of the Federal Medical and Biological Agency of Russia” Russia; FSBEI of Additional Professional Education “Russian Medical Academy of Continuous Professional Education” of the MH RF
Russian Federation
Russian Federation
Leonid Makarov
Moscow, 20 Moskvorechye str.;
Moscow, 2/1 Barrikadnaya str., buil.1
V. N. Komoliatova
FSBI “FSCC for Children and Adolescents of the Federal Medical and Biological Agency of Russia” Russia; FSBEI of Additional Professional Education “Russian Medical Academy of Continuous Professional Education” of the MH RF
Russian Federation
Russian Federation
Moscow, 20 Moskvorechye str.;
Moscow, 2/1 Barrikadnaya str., buil.1
D. A. Besportochnyi
FSBI “FSCC for Children and Adolescents of the Federal Medical and Biological Agency of Russia” Russia
Russian Federation
Russian Federation
Moscow, 20 Moskvorechye str.
A. G. Akopyan
FSBI “FSCC for Children and Adolescents of the Federal Medical and Biological Agency of Russia” Russia
Russian Federation
Russian Federation
Moscow, 20 Moskvorechye str.
E. V. Zaklyazminskaya
FSBRI «Russian research center of surgery named after academician B.V.Petrovsky»
Russian Federation
Russian Federation
Moscow, 2 Abrikosovsky Lane.
I. I. Kiseleva
FSBI “FSCC for Children and Adolescents of the Federal Medical and Biological Agency of Russia” Russia
Russian Federation
Russian Federation
Moscow, 20 Moskvorechye str.
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For citations:
Makarov L.M., Komoliatova V.N., Besportochnyi D.A., Akopyan A.G., Zaklyazminskaya E.V., Kiseleva I.I. Alternation of the QRS complex - new or well-forgotten old? Clinical observations. Journal of Arrhythmology. 2025;32(4):59-64. https://doi.org/10.35336/VA-1545
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