[Correlation coefficients of the basic indicators of cardiohemodynamics, blood gas levels and acid-base status in influenza]. / Korreliatsionnye vzaimootnosheniia osnovnykh pokazatelei kardiogemodinamiki, gazovogo sostava krovi i kislotno-shchelochnogo sostoianiia pri grippe.

The main parameters of the cardiohemodynamics, blood gas composition and acid-base balance were studied in 82 patients with uncomplicated influenza and in 124 patients with influenza aggravated by acute pneumonia. The disorders revealed were essentially dependent on the disease gravity and complications. To evaluate quantitatively the relationship between the respiratory and cardiovascular systems, use was made of the correlation ratios for all the pair parameters under study. The pulmonary artery pressure was highly dependent on the level of the diastolic systemic pressure in grave uncomplicated influenza (r = -0.932) and on the heart rate (r = +0.861) in influenza aggravated by pneumonia. These findings enabled the derivation of appropriate regression equations, which are simple and can thus be widely used in practice to measure the pressure in the pulmonary circulation and to correct pulmonary hypertension. The making up of the correlation schemes permitted evaluating the tendencies in the changes of the most important parameters of the cardiohemodynamics and homeostasis and forming a judgement about tension of the compensatory processes in the body during grave influenza and influenza complicated by acute pneumonia.