[Changes in the functional state of patients after radical correction of tetralogy of Fallot]. / Dinamika funktsional'nogo sostoianiia bol'nykh posle radikal'noi korrektsii tetrady Fallo.

The authors studied the changes in the functional condition of patients in the immediate and long-term periods after radical correction of Fallot's tetralogy. The values of the heart pumping and contractile functions at rest and during bicycle ergometer exercise were studied by tetrapolar chest rheography; oxygen consumption was studied by spirometry. Thirty patients were examined in the early postoperative period and then 6 and 12 months after the operation. The values were compared with those in healthy children. It is shown that 12 months after the operation the clinical condition improves, the physical capacity for work increases, and the exercise response is more adequate. Adequacy of the correction of the anomaly is the main determinant of the patients' functional condition by this time.

[Functional state of the cardiorespiratory system in healthy children at rest and during the bicycle ergometry test]. / Funktsiia kardiorespiratornoi sistemy u zdorovykh detei v pokoe i pri veloérgometricheskoi nagruzke.

Altogether 25 healthy untrained children aged 9 to 12 years were examined. There were 11 boys and 14 girls. The following parameters were measured at rest and during bicycle ergometry: the heart rate, oxygen consumption, pulmonary ventilation, metabolic units, the ratio of oxygen consumption increment, oxygen pulse, stroke and cardiac indices, index of the Q-Z interval and work fitness. The ECG was recorded as well. During exercise, adequate reaction of the cardiorespiratory system was characterized by linear growth of the heart rate, cardiac index and oxygen consumption together with a proportional shortening of the Q-Z interval. At all levels of exercise the girls manifested more pronounced chronotropic stimulation, leading to the attainment of the submaximal heart rate (1.5 Watt/kg). On chronotropic delay overtension of inotropic function was demonstrable in children exposed to high loads, which was accompanied by restriction of the cardiac index growth.