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  • Title: [The cardiac index dynamics of patients after the radical correction of tetralogy of Fallot depending on the level of the pressure-support ventilation (PSV) regimen].
    Author: Nikitin ES, Tskhovrebov SV, Zatevakhina MV, Makrushin IM, Safronova EM, Suvorova GIu.
    Journal: Anesteziol Reanimatol; 1998; (1):47-9. PubMed ID: 9553262.
    Abstract:
    Seventeen patients were examined, reoperated on for correction of Fallot's tetralogy on the open heart after a previous aortopulmonary anastomosis. Pressure support ventilation (PSV) was used in all patients during transfer to spontaneous pressure, making use of different levels of pressure support (20, 15, 13, 10, and 8 mm H2O). Decrease of pressure support from 20-15 mm H2O to 13 mm H2O resulted in a sharp increase of cardiac index. We explain this phenomenon by a drastic increase of the respiratory volume during the use of high PSV levels (20-15 mm H2O), surpassing 1.5-2 times the physiological and age-specific norm; this leads to a sharp increase of the mean intrathoracic pressure, disturbing the cardiovascular function.
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