OBJECTIVE To examine the relation between patterns of ventricular remodelling and haemodynamic and neurohormonal variables, at rest and during symptom limited exercise, in the year following acute myocardial infarction in patients not receiving angiotensin converting enzyme (ACE) inhibitors. DESIGN A prospective observational study. PATIENTS 65 patients recruited following hospital admissio...

PURPOSE Heart rate variability (HRV) decreases after an acute myocardial infarction (AMI) due to changes in cardiac autonomic balance. The purpose of the present study, therefore, was to evaluate the effects of a progressive exercise protocol used in phase I cardiac rehabilitation on the HRV of patients with post-AMI. MATERIAL AND METHODS Thirty-seven patients who had been admitted to hospita...

1. The activity of pyruvate dehydrogenase in its active and inactive forms was measured in biopsy samples obtained from the vastus lateralis muscle of healthy subjects before and after exercise. 2. At rest, 40 +/- 4% (mean +/- SEM) of the enzyme was in the active form. 3. After progressive aerobic exercise to exhaustion (n = 5), 88 +/- 2.3% was in the active form. 4. After intermittent supramax...

Cardiovascular drift, the progressive increase in heart rate and decrease in stroke volume that begins after approximately 10 min of prolonged moderate-intensity exercise, is associated with decreased maximal oxygen uptake, particularly during heat stress. Consequently, the increased heart rate reflects an increased relative metabolic intensity during prolonged exercise in the heat when cardiov...

BACKGROUND Little is known about cardiorespiratory and metabolic response in healthy children during progressive maximal exercise test. OBJECTIVE To test the hypothesis that children show different responses in cardiorespiratory and metabolic parameters during progressive maximal exercise test when compared with adults. METHODS Twenty-five healthy children (gender, 15M/10F; age, 10.2 +/- 0....

Pompe disease is a progressive multisystem disease caused by a lysosomal acid α-glycosidase enzyme (GAA) defi ciency, resulting in lysosomal accumulation of glycogen. The late-onset form is characterized by progressive skeletal and respiratory muscle dysfunction leading to functional disability and impairment of quality of life. Enzyme replacement therapy (ERT) and treatments, such as protein-e...

McArdle’s disease is an autosomal recessive disorder of glycogen metabolism, which occurs due to deficiency of myophosphorylase, an enzyme required for conversion of glycogen to glucose-1-phosphate in the muscle [1]. It is also known as Glycogen Storage Disease Type V or Glycogenosis Type V. This syndrome typically presents in the first two decades of life with exercise intolerance, muscle pain...

BACKGROUND Exercise training in pulmonary arterial hypertension (PH) is a promising adjunct to medical treatment. However, it is still unclear whether training is beneficial for all PH patients. We hypothesized that right ventricular adaptation plays a pivotal role in the response to training. METHODS AND RESULTS Two different dosages of monocrotaline were used in rats to model stable PH with...