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[Comparative characteristics of systemic and pulmonary hemodynamics during changes in the heart preloading]
1Institute of Experimental Medicine, Russian Acad. Med. Sci., St. Petersburg, 197376, Acad. Pavlov St., 12, Russia.
Abstract:
A greater degree of relative shifts in the systemic arterial pressure in enhancing the right heart pre-load as compared with its diminishing. A primary role of the compensation mechanisms of the enhanced systemic arterial pressure level. The main role in the compensation of integral shifts of the arterial pressure induced by changes in the heart pre-load was shown to belong to the vascular resistance both in the major and the minor circulation circles. An idea of a greater involvement of the capacity function of the vascular bed in the minor circulation circle as compared with that in the major circulation circle in systemic haemodynamic shifts in changes of the heart pre-load, has been advanced.