[The mechanisms of the adaptation of the cardiovascular system to physical loading in patients with arterial hypertension in the late periods following the hemodynamically adequate correction of aortic coarctation].

Arterial hypertension was detected in 40 (59.7%) of 67 patients operated on for aortic coarctation. The patients' age ranged from 15 to 35 years.

[Changes in the functional state of patients after radical correction of tetralogy of Fallot].

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.

[Arterial hypertension in the late period after the hemodynamically adequate correction of aortic coarctation].

The paper is concerned with a study of arterial hypertension in the long-term periods after the resection of coarctation of aorta in 77 patients aged 6 to 35 years. The complex of the patients' examination included bicycle ergometry. Arterial hypertension was revealed in 59.

[Physical rehabilitation using bicycle ergometry training of patients after aortic valve replacement].

After prosthetics of the aortal valve 30 patients underwent bicycle ergometry training at the sanatorial stage of rehabilitation. 10 patients who did not undergo bicycle ergometry training made up the control group. The efficacy of bicycle ergometry training was assessed according to the time-course of changes in pump and contractile functions of the heart and oxygen consumption at rest and during bicycle ergometry.

[Use of spirometry and bicycle ergometry in the assessment of the stability of mitral valve bioprosthesis].

Muscular and cardiac performance was assessed a spirometry and bicycle ergometry in two groups of patients aged 25-55 with mitral xenobioprostheses functioning normally. 36 patients were examined 1-3 years following surgery (group I), 23 patients in 3.5-8 years.

[Functional assessment of the state of patients after Fontan's operation].

A bicycle ergometric test was performed in 27 patients 2.5 months to 5 years after Fontana's operation in order to study their physical working capacity and major parameters for cardiac pump and contractile functions by tetrapolar chest rheography and those for external respiration. In the early periods following the surgery, the patients showed a low physical working capacity with a respective reduction in the pump and contractile functions of the heart.

[Functional state of the cardiorespiratory system in healthy children at rest and during the bicycle ergometry test].

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.

[Rehabilitation of patients after heart surgery: experience and problems].

The problem of rehabilitation of cardiac surgical patients is of great humane and socioeconomic significance. Over years, a great scientific and practical experience has gained in rehabilitating patients with acquired and congenital heart diseases after surgical correction. Stages of rehabilitation, a complex of medical, somatic, psychological, and socio-occupational measures are specified.

[Bicycle ergometry training during the sanatorium stage of patient rehabilitation after insertion of aortic valve prosthesis].

A sanatorium stage in the rehabilitation of patients who have aortic valve prosthesis is of great importance. The impact of bicycle ergometric trainings on these patients' physical rehabilitation had been little studied. Bicycle ergometric testing prior to and following the training and examination of external respiratory parameters enabled their efficiency to be increased.

[Mechanisms of adaptation of the cardiorespiratory system to physical loads in cardiosurgical patients].

Problems related to the assessment of systemic oxygen transport and central hemodynamic parameters at exercise tests after surgical correction of congenital and acquired heart diseases are discussed. Several types of adaptation to stress have been identified. Noninvasive direct measurement of cardiac output under stress is shown to be useful as cardiac output values may be different where oxygen consumption levels are similar.

[A new approach to the qualitative assessment of the reaction to physical loading during bicycle ergometry of patients following aortic prosthesis].

The paper is concerned with the objectivization of qualitative assessment of a response to exercise testing during rehabilitation of patients after aortic valve replacement. The authors propose methods for a study of hemodynamic provision of submaximum and threshold exercises confirming significantly a higher myocardial reserve in patients after submaximum exercises. Hemodynamic characterization of different types of threshold reactions has shown that a common feature in the majority of patients is a decrease in cardiac ejection during exercise testing, mainly as a result of ino- or chronotropic depletion.

[Changes in ECG indices and hemodynamics during bicycle ergometry of patients following aortic valve prosthesis].

Correlated electrocardiographic and hemodynamic changes have been demonstrated in 60 convalescent patients within 3 years after aortic valve replacement by means of bicycle ergometry (BEM) and simultaneous Kubicek's impedance rheoplethysmography. As electrocardiographic ischemic changes are more frequent during recovery, while their hemodynamic causes are different during and after exercise, BEM load increment should be intermittent in patients with aortic valve prosthesis. Exercise-induced increase of R voltage that was mostly combined with inadequate hemodynamic response and accompanied by ischemic ST depression may be an additional criterion of threshold stress.

[Evaluation of the cardiorespiratory system during rehabilitation of patients after prosthesis of the mitral and annuloplasty of the tricuspid valves].

Twenty-five patients undergoing rehabilitation for 2 to 3 years after surgery were examined. External respiratory parameters were investigated by means of bicycle spiroergometry, and the pump and contractile functions of the heart were assessed using tetrapolar chest rheography. In addition to positive clinical developments and improved functional class, physical working capacity of the patients was found to be increased.

[Evaluation of the pump and contractile functions of the heart in healthy persons by tetrapolar chest rheography].

The central hemodynamics and myocardial contractility were studied in 40 normal untrained men by tetrapolar chest rheography. The response to exercise was studied and compared in subjects with eu- and hypokinetic circulatory types. It was revealed that marked differences in the SI, CI, SPR recorded at rest lessen with exercise increase and disappear at submaximal and maximal levels of exercise at the expense of a higher rate of changes in these parameters in subjects with the hypokinetic circulatory type.

[Evaluation of patient rehabilitation effectiveness after aortic valve prosthesis based on spiroergometric study data].

Patients after surgery introducing aortal valve prosthesis in cases of rheumatic aortal defect or defect due to bacterial endocarditis were examined using spiro- and bicycle ergometry. Two groups of patients were compared: those subjected to rehabilitation procedures and a control group undergoing no rehabilitation program. Functional results were better in post-rehabilitation patients.

[Hemodynamics and load tolerance in pregnant women with mitral heart defects].

Changes in the hemodynamic parameters under conditions of physical load on a bicycle ergometer were studied in 107 pregnant women among whom 73 had mitral valvular disease and 34 did not have a somatic disease. Three groups of tolerance to physical load and the criteria of an adequate or inadequate reaction to it were determined. This method of examination of the reserve potentialities of the heart reveals the preclinical stage of cardiac insufficiency and borderline conditions, owing to which the most rational predelivery therapy and the method of delivery may be chosen in advance.

[Method of conduction of the veloergometric test in rehabilitation of cardiosurgical patients].

Determination of the physical working capacity of patients after surgical correction of heart disease and appraisal of the functional condition of the cardiovascular and respiratory systems allow for establishing a program of physical rehabilitation and judge its efficacy during follow-up of the patient. The bicycle ergometry test in cardiosurgical patients has certain features. The submaximum and threshold loads should be distinguished.