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Biomedical subjects

F Sardella

Publications and source records attributed to F Sardella.

At least 37 records · Page 2Linked to original sources
PubMed1985

Maximal anaerobic (lactic) capacity and power of the horse.

Blood lactate concentrations were determined in 16 horses (three Thoroughbreds, seven Standardbreds and six polo ponies) before and 5 mins after they galloped over distances of 200, 300 and 400 m at maximal speed. The highest net lactate concentration (delta Lamax) of 14 to 15 mmol/litre was attained by the polo ponies and the highest speed by the Thoroughbreds. The maximal rate of lactate production (delta Låmax) was about 35 mmol/litre X min for the polo ponies and 20 to 25 mmol/litre X min for the Standardbreds and the Thoroughbreds. Values for delta Lamax and delta Låmax were similar to those measured in human athletes after exhaustive work. delta Låmax increases with the speed (v) and can be described by the equation delta Lå = a (v-v1), where a is a proportionality constant representing the amount of lactate needed to cover a unit distance and v1 the theoretical speed at which delta Lå = 0 X v1 was highest for the Thoroughbreds and lowest for the polo ponies; this difference could be caused by the effect of training and/or to genetic differences among the different breeds of horses X v1 could be a useful index of the fitness of a horse following a training programme.

Anaerobiosis↗
PubMed1985

The relationship of maximal alactacid anaerobic power to somatotype in trained subjects.

The purpose of the present study was to investigate the relationship between somatotype components and maximal alactacid anaerobic power (MAAP) in trained subjects. The somatotype components (endomorphy: means = 2.66, S.D. = +/- 0.78; mesomorphy: means = 5.45, S.D. = +/- 1.12; ectomorphy: means = 2.46, S.D. = +/- 0.88) and total MAAP were measured in 40 male fencers (aged, means 21.79, S.D. = +/- 3.97) in order to determine the correlations. The results did not show any correlations between the parameters. It can be concluded that the MAAP of an individual does not depend on the somatotype; but it may also be assumed that MAAP show changes with the percentage of fibre type, enzymatic activity in these fibres involved by large muscle groups which are relatively related to musculo-skeletal development (second component of somatotype) and neuro-muscular properties of the subjects, all having a genetic basis.

Adolescent↗
PubMed1984

[Polygraphic study of left ventricular function in severe hepatitis cirrhosis].

Systolic time intervals have been investigated in 26 subjects with severe liver cirrhosis. The patients were subdivided as follows: 15 with alcoholic cirrhosis; 11 with post-necrotic cirrhosis. Systolic time intervals were recorded and measured according to the Weissler's method. The left ventricular ejection time was significantly shortened due to the low systemic vascular resistance, while the pre-ejection period was unchanged, denoting preserved myocardial contractility. The isometric contraction time was also significantly shortened, thus confirming a good myocardial response to increased pre-load due to hyperdynamic state. The cardiac performance as assessed by systolic time intervals, is unchanged in hepatic cirrhosis.

Adult↗
PubMed1983

Evaluation of systolic time intervals in patients with angina pectoris.

We have explored the systolic time intervals of 52 patients with angina pectoris at the time of their hospitalization in our wards. Our results are in close agreement with published data, essentially indicating prolongation of the preejection time and shortening of the ejection time. These alterations of systolic times can be interpreted pathophysiologically as as expressing reduced myocardial contractility. The long PEP-short LVET polygraph picture, occurring in the course of chronic ischemic heart disease, reveals the deficit of myocardial contractility at a stage of the disease at which clinical evidence of left ventricular failure is usually not yet detectable.

Adolescent↗
PubMed1983

A polygraph study of ischemic heart disease: behavior of systolic times in acute myocardial infarction.

The authors investigated systolic time intervals in 28 cases of acute myocardial infarction (AMI). Polygraph recordings were made on the first day of illness and repeated at two, three, five, and seven hospital days. The patients were divided into two groups: one with a contributory history of ischemic and/or hypertensive heart disease (Group PH for "positive history") and one without such history (Group NH for "negative history"). The influence of numerous variables on systolic times were explored in both groups, and the emerging data were processed by multiple stepwise regression analysis. The results show that the left ventricular ejection time (LVET) is invariably shortened in AMI, whereas the pre-ejection indices (PEP and ICT) afford definite differentiation of patients of Group PH (with lengthened PEP and ICT values) from those of Group NH (shortened PEP and ICT). The authors emphasize the importance of obtaining polygraph recordings very early in the course of AMI and of taking into account the patient's history in view of a correct assessment of pre-ejection times.

Aged↗
PubMed1982

A polygraph study of ischemic heart disease: short-term prognosis of acute myocardial infarction based on early modifications of isometric contraction time.

The authors have explored the early modifications of systolic time intervals in 90 patients hospitalized as emergency cases for acute myocardial infarction. From analysis and interpretation of the collected data they conclude that such modifications have considerable prognostic value. All patients fitting the specifications of NYHA classes I and II, but at the same time showing a shortening of the isometric contraction time to less than 39 +/- 1.4 ms turned out to constitute a high-risk group for the development of major mechanical and electrical complications in the next 2 weeks.

Aged↗
PubMed1981

[Sclerodermic heart. Report of a case with malignant evolution (author's transl)].

In progressive systemic sclerosis, cardiac involvement, evidenced by histology, is rather unusual and even more rarely it gives clinical manifestations. In our patient cardiac symptoms, characterized by recurrent pulmonary edema as well as by serious conduction defects and arrhythmias, are prevailing and have a rapid and fatal course, whereas the involvement of the skin and of other internal organs is not important. The post-mortem examination gives an evident explanation of the clinical course of the disease, which we can consider as a typical manifestation of sclerodermic heart.

Adult↗
PubMed1976

[A study of atrio-ventricular conduction in subjects with the Lown-Ganong-Levine syndrome (author's transl)].

Eight subjects with the Lown-Ganong-Levine syndrome were studied by means of His bundle recordings during sinus rhythm and during atrial pacing. During sinus rhythm in all cases, the A-H interval was lesser than the mean value observed in 10 control subjects. Atrial pacing at rates up to 190/min produced three types of responses. Four patients showed an initial increment in A-H interval, followed by a plateau response at higher rates. One patient showed an initial increment and a plateau response in A-H interval at low and intermediate rates, followed by a sudden and conspicuous increment at higher rates, indicating conduction of impulse through the A-V node, due to refractoriness of the by-pass tract. Three patients showed a progressive increase in A-H interval similar to that of normal subjects but to a lesser degree. The possible mechanisms for the different types of response are discussed.

Adult↗