189 research outputs found
Misleading echocardiographic diagnosis of anomalous origin of the right coronary artery from the pulmonary artery
No full textA 1-year-old boy was referred to our hospital for further investigation of mitral regurgitation. Color-Doppler echocardiography revealed the site of the anomalous origin of the left coronary artery which was confirmed by a cineangiographic study. This case is interesting for several reasons: the first is that the anomalous left coronary artery originated from the right pulmonary artery; the second is that two-dimensional echocardiographic findings can be misleading, i.e., a vessel-like structure which seemed to be the left coronary artery arising normally from the aorta was visualized; and the last is that a two-dimensional color-Doppler echocardiogram was useful in the diagnosis of the anomalous origin of the left coronary artery. The patient underwent implantation of the anomalous left coronary artery as well as Kay's plasty of the mitral valve, and has been doing well since then
La ventilazione nel nuoto
No full textLa respirazione nel nuoto avviene in condizioni meccaniche diverse rispetto a quanto accade
per altri sport terrestri: i muscoli inspiratori devono contrastare la pressione dell'acqua.
Come allenarli nello specifico di questa disciplina sportiva
Sport-related peripheral nerve injuries : part 1
No full textSport–related strenuous physical activity and trauma are among the causes of peripheral nerves injuries, due in most cases to direct blow, compression or repeated traction or friction. Although in most cases the diagnosis is obvious, subtle peripheral nerve injuries can be difficult to recognize and, in most cases, require the support of appropriate instrumental evaluations. This review is divided into two parts devoted to the most common upper and lower limb peripheral nerves injuries, the anatomical reasons, the clinical presentation and the most helpful diagnostic tools
New television technique for natural head and body posture analysis
No full textA new television technique that proved to be faster than conventional photographic analysis has been developed and applied to the evaluation of the head and body natural standing posture in 303 healthy children, ages 6 to 11, and in 186 healthy young adults. In the lateral plane all subjects had extended head (soft tissue Frankfurt plane), with parallel Camper's and occlusal planes. The neck was halfway between the horizontal and vertical planes. Most angles significantly correlated with each other. The occlusal and neck angles showed a significant effect of age, being larger in children than in adults. In children the neck was more flexed, and the occlusal plane was more inclined downward. The results were in accord with previous photographic evaluations showing that the applied method was reliable and could be usefully employed in postural investigations. The results also confirmed that in healthy subjects, regardless of age, the soft tissue Frankfurt plane is extended, not horizontal
Perfecting of the crawl in non-skilled swimmers : comparison between the drag reduction and improvement of the propulsion
No full textSwimming results as a compromise between propulsive actions
and gliding through water. This research observed the improvements
in non-skilled swimmers taught by two specific training
programs. The first aimed to have a drag reduction and a better
glide (improving the balance, the position in the water and the
breath control). The second program aimed to improve the efficiency
of the propulsive actions (with respect to continuity and
length of the armstroke, rhythm of the actions). The two perfection
methods were proposed to 97 non skilled subjects. In the
pre-post analysis within each group an improvement of the efficiency
index in all male subjects and in the females working on
propulsion were found. Moreover and an improvement of long
distance swim was recorded in all subjects
Analysis and comparison of results of the Mader test in different strokes in agonistic swimmers
No full textSeveral studies were performed to analyze both the blood lactate
concentration after competitions and to set the optimal
intensity level during the training. The aim of this study was to
evaluate the differences in lactate production between high
level male and female four-strokes-swimmers and the differences
in lactate concentrations among these strokes in swimmers
of the same gender. Forty male and forty female swimmers
performed a modified Mader test in their own discipline.
The time for 200m at the threshold speed, the [La-] peak and
the [La-]/time at the anaerobic threshold ratio were considered.
Male athletes produced more lactate for each stroke than
the female counterparts. The higher peak lactate concentration
in the male athletes were found in breaststroke, whereas in
females athletes the higher peak was found in butterfly
Efectos metabolicos y cardiovasculares inmediatos a la estimulacion electrica funcional en atletas jovenes no profesionales
No full textTowards a safe aquatic literacy: Teaching the breaststroke swimming with mobile devices' support : A preliminary study
No full textProblem Statement: Technical swimming skills, the breaststroke in particular, are basic for a safe aquatic literacy and drowning prevention. Learn-to-swim programs cope to several teaching constraints, including providing adequate feedbacks to the learner to guarantee the best motor control and skills’ acquisition. Recent technology makes mobile devices user-friendly and suitable in providing video feedbacks to the athletes or to the learners during coaching or teaching physical education and sports, even in particular environments, such as swimming pools. Approach: In this study, we supported a breaststroke learn-to-swim program with video feedbacks by mobile devices (MDS) and we compared the outcomes to a program in which the teacher used conventional feedbacks, comments and corrections, only provided by gesture and verbal communication (C). Sixteen young participants (20.6±0.5 years) were assigned to MDS or C. Before and after the 8-weeks learning program, the breaststroke skills of the participants were evaluated by both quantitative and qualitative analysis. Purpose: The study aimed to assess whether augmented feedbacks improved the learning of breaststroke skills more than the standard approach commonly used in swimming schools. Results: MDS and C resulted comparable, as no interaction was retrieved from the Mixed-model analysis of variance. However, the qualitative analysis revealed that MDS improved in a higher number of features among those observed. Conclusions: The results seem to indicate that learn-to-swim programs with augmented feedbacks, as by mobile devices, might be beneficial to the learners and recommended to the teachers
Análisis y comparación de algunos esquemas motores básicos acuáticos en la primera infancia
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