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Biomedical subjects

M U Ramos

Publications and source records attributed to M U Ramos.

5 recordsLinked to original sources
PubMed1977

An abnormal early diastolic impedance waveform: a predictor of poor prognosis in the cardiac patient?

The first derivative of the thoracic impedance (dZ/dt) was recorded in 81 patients entering the Cardiac Care Unit with diverse acute cardiovascular illnesses. An abnormal diastolic impedance waveform was identified in 30 of the patients. These were compared with the other 51 patients admitted under similar circumstances who did not show this abnormal waveform. Retrospective analysis of these 81 patients reveals that the ones showing the abnormal wave eventually had a poorer prognosis (66 per cent were eventually classified as Class III and IV) versus 90 per cent of the patients without the abnormality who were eventually classified under Class I and II (X2 = 28.6; p less than .001). More than 50 per cent of the 30 patients who showed the abnormality died, and 16 out of the 18 who died belonged to the group who showed the abnormal waveform (X2 = 26.7; P less than .001). From this analysis it appears that the presence of this abnormal early diastolic waveform of the dZ/dt tracing can be used as a predictor of outcome in patients with several myocardial insults, both in terms of functional disability and death.

Adolescent↗
PubMed1975

Exercise electrocardiograms: Code for their clinical evaluation.

This report suggests the use of a simple clinical method of codification of the most significant electrocardiographic changes as a result of the exercise stress test. It uses common abbreviations in the evaluation of the electrocardiographic findings before, during and after exercise. The five major categories to be codified include: (1) the basic electrocardiographic pattern, (2) the heart rate, (3) the pattern of ventricular conduction, (4) the pattern of rhythm and (5) the ST segment deviation. The initial sequence of five symbols indicates the findings in the preexercise electrocardiogram. This is followed by the word "to" with a subscript number. The number in subscript indicates the peak heart rate achieved during the exercise. The sequence of symbols following "to[]" serves to indicate the electrocardiographic changes observed in the postexercise period. The data codified using this system have been found to be concise and easily comparable. The familiarity of the symbols used facilitates its learning and application.

Diagnosis, Computer-Assisted↗