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At least 487 records · Page 27Linked to original sources
PubMed1987

[Prognostic significance of early ergometry following acute transmural first-time myocardial infarct].

A submaximal exercise test (70% of the maximal age related heart-rate) was performed in 324 patients (214 m, 60 w, mean age 55.2 +/- 11.35 y, 154 anterior infarction, 117 posterior infarction, 3 BBB) within the third week after their first transmural infarction. 50 patients were unable to be exercised because of medical contraindications. The patients were divided in 3 subgroups according to the events during the follow up of 23.6 +/- 14.6 months: group I - patients with reinfarction (22 pts = 8.1%), 4 of them died, group II - patients who died because of cardiac events (sudden death or cardiac decompensation) (13 pts = 4.7%) and group III - patients who had no further events (239 pts = 87.2%). All patients were comparable concerning age, exercise tolerance, appearing of angina, T-shift, monophasic ST-segment-elevation, systolic blood pressure behaviour, ventricular arrhythmias or AV-block. ST-segment depression was significantly more frequent in the group I patients (p less than 0.02) as much as an obvious reduction of the working capacity. Patients who were not exercised (because of contra-indications) had a significant higher mortality during follow up (32% vs. 6%). We conclude that exercise test in the early phase after myocardial infarction gives no information concerning mortality, but there was found statistically more frequent ST-segment depressions in the group of patients with reinfarction as much as an obvious reduction of the working capacity. Thus, exercise test is of value for the detection of patients at risk for reinfarction.

Angina Pectoris↗
PubMed1987

[Long-term ergometry and echocardiography results in patients following acute myocardial infarct with the best possible completion of rehabilitation phase I in accordance with the indications].

55 patients (43 males at the age of 60.3 +/- 10.8 years and 12 females at the age of 71.6 +/- 8.4 years) with earliest possible end of the rehabilitation phase I after acute myocardial infarction beginning with the end of the second week were as to their ergometric and echocardiographic parameters compared with an identical control group with usual duration of mobilisation. When discharged from hospital and one year after infarction they obtained with 50 to 23 and 72-26 watt respectively, the same numbers of watt as the patients of the control group. In the two groups the increase in vitality after the first year was obtained exclusively by men. In a short duration of phase I of two weeks they obtained the most favourable values with regard to number of watt, product of pressure rate, diastolic pulmonary pressure, diameter of left ventricle and atrium as well as to the shortening fraction at discharge from hospital and one year after infarction. The values were identical to those in the control group with usual duration of the rehabilitation phase I.

Aged↗
PubMed1986

Optimal pedalling rate in prolonged bouts of cycle ergometry.

This study was designed to investigate the variables which contribute to the determination of optimal pedalling rate in cycling. Five trained bicycle racers were used as subjects for the study. The experiment consisted of five 20- to 30-min tests at about 85% of each subject's pre-determined VO2max. Pedal rates of 40, 60, 80, 100, and 120 rpm were used. In the experiment, efficiency, heart rate, and perceived exertion measures were obtained at 10 and 20 min of exercise. Blood lactate concentration and plasma levels of epinephrine and norepinephrine were measured at rest, during the exercise sampling periods, and at 5 min of recovery following the exercise bout. When compared across pedal rates, gross efficiency, heart rate, and perceived exertion all were minimal at 60 or 80 rpm for each sampling period. Blood lactate showed the same relationship to pedal rate as the preceding variables at 10 min of exercise but not late in the test. The catecholamine values appeared to follow a similar trend but not significantly. The experiment showed that for this group of cyclists an optimal pedal rate existed for a prolonged period of exercise and was evident in measures of both efficiency and perceived exertion. The experiment indicates that, for researchers and for cyclists who use high power outputs, the choice of pedal rate is an important one.

Adult↗
PubMed1986

[Hemodynamic indices assessed by impedance cardiography in patients with the subacute stage of myocardial infarct before and during bicycle ergometry].

The hemodynamic indices were determined in 51 patients with myocardial infarction, subacute stage, before and after bicycle ergometric loading. The following indices were determined by impedance cardiography: cardiac output, total peripheral resistance, volume velocity of blood ejection, power of cardiac contractions, index of myocardial contractility etc. The results reveal that the patients with subacute stage of myocardial infarction have reduced reserve possibility of blood circulation apparatus. Signs of latent cardiac failure are manifested in case of extensive localization with transmural involvement, because of seven disorders in the contractile function of myocardium. The adaptation to physical loading, in the rest of the patients, is better but still far less than that in healthy subjects.

Adult↗
PubMed1986

[Endurance bicycle ergometry at 0 degrees C: cardio-respiratory and metabolic course].

The purpose of the present study is to determine the physiological and metabolic variations during and after an exhaustive exercise in different thermal conditions (0 degree C and 20 degrees C). For the eleven experimental subjects, the maximal power output is the same at 0 degrees C and 20 degrees C: 330 +/- 30 W (Mean +/- s). The heart rate is lower (bradycardia) at rest, exhaustion, and recovery. However, these differences are only significant (p less than 0.05) at exhaustion. The oxygen consumption and pulmonary ventilation is higher at 0 degree C in comparison with the measurements at 20 degrees C. The blood lactate concentrations are significantly lower at 0 degree C and we observe the inverse phenomenon for the bicarbonates. The bases excess was significant at 4, 6 and 10th minute of recovery time. These values are higher for the measurements taken at 0 degree C. The results have shown that the cold stress after an exhaustive exercise and during recovery, can induce a physiological and metabolic response unlike of those at 20 degrees C.

Adolescent↗