Effects of knee surgery on cardiac function in soccer players.
OBJECTIVE
To evaluate the effects of knee surgery on hematocrit and hemoglobin concentration and on resting cardiac parameters as measured by echocardiography.


METHODS
Ten soccer players who underwent knee surgery were evaluated before (T1) and after (T2) hospitalization within a 7-day interval.


RESULTS
After hospitalization, end diastolic volume and stroke volume were significantly reduced (P < 0.05) by 14 and 22%, respectively. Despite a significant increase in resting heart rate (T1: 68 +/- 3.3 beats/ min, T2: 72 +/- 3.1 beats/min, P < 0.05), cardiac output was significantly decreased (T1: 4.89 +/- 0.56 liters/min; 3.95 +/- 0.62 liters/min, P < 0.05). The ejection fraction was 65% at T1 and fell to 58% at T2 (P < 0.05). After hospitalization, significant decreases in hemoglobin concentration and hematocrit were observed, suggesting a fall in blood volume.


CONCLUSIONS
In soccer players, knee surgery leads to resting cardiac deconditioning, which is characterized by a significant reduction in stroke volume.
Olivier
Nicolas
N
Polyclinique de Riaumont, Liévin, France.
Legrand
Renaud
R
Rogez
Jacques
J
Berthoin
Serge
S
Weissland
Thierry
T
D000328:Adult; D002318:Cardiovascular Diseases / Q000000981:diagnostic imaging / Q000209:etiology*; D003971:Diastole; D006339:Heart Rate; D006400:Hematocrit; D006454:Hemoglobins; D006801:Humans; D007718:Knee Injuries / Q000150:complications / Q000601:surgery*; D008297:Male; D011446:Prospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D012916:Soccer / Q000293:injuries*; D013318:Stroke Volume; D013997:Time Factors; D014463:Ultrasonography
D006454:Hemoglobins