The approximate entropy of the electromyographic signals of tremor correlates with the osmotic fragility of human erythrocytes.

Background: The main problem of tremor is the damage caused to the quality of the life of patients, especially those at more advanced ages. There is not a consensus yet about the origins of this disorder, but it can be examined in the correlations between the biological signs of aging and the tremor characteristics.

Methods: This work sought correlations between the osmotic fragility of erythrocytes and features extracted from electromyographic (EMG) activity resulting from physiological tremor in healthy patients (N = 44) at different ages (24-87 years).

A review on techniques for tremor recording and quantification.

Tremor is the most common movement disorder and differs from other disorders by its repetitive, stereotyped movements, with regular frequency and amplitude. The three most frequent pathological forms of it are the essential tremor (ET), the Parkinson's disease (PD) tremor, and the enhanced physiological tremor. The ET and PD tremor affect the older population mostly.

[Analysis of electrocardiographic recordings associated with acute myocardial infarction].

Objective: Evaluate correlations between variations in eletrocardiogram (ECG) recordings and acute myocardial infarction.

Methods: Use of a low-cost software to digitalize printed and/or ".pdf" file format ECG recordings.