Hemisystole
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Hemisystole refers to the isolated contraction of one or the other ventricle, which may occur during the agonal period or in an excised surviving heart. This asynergy of the ventricles is considered a manifestation of longitudinal dissociation.
Encyclopedia entry (1928–1936)
HEMISYSTOLE, isolated contraction of one or the other ventricle; may occur in the agonal period or on an excised (surviving) heart (Kuliabko). Asynergy of the ventricles (in terms of contraction time and force) belongs to the phenomena of longitudinal dissociation (see Dissociation, longitudinal); on the attached curve, for example, only the left ventricle is contracting [in the lower part of the figure is the electrocardiogram, above it is the suspension curve of the right ventricle (after Hoffmann-Zelenin)].
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“Hemisystole.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/hemisystole/