ABSTRACT
The pattern of change of the O2 uptake . beat-1 versus the difference between the measured and predicted MET level varied considerably during a progressive exercise stress test among patients with coronary artery disease and normals. For normal subjects under work load changes from 2 to 10 MET (1 MET = resting VO2), the O2 . beat-1 approximately doubled; whereas for some patients, the value fell near the end of the stress rest to a level near that at the beginning. This parameter is one measure of the efficiency of the cardiovascular system to respond to exercise and appeared to correlate with the physiological condition of the patient.
Subject(s)
Coronary Disease/physiopathology , Heart Function Tests , Oxygen Consumption , Physical Exertion , Coronary Artery Bypass , Coronary Disease/rehabilitation , Electrocardiography , Female , Heart/physiopathology , Humans , MaleSubject(s)
Electrodiagnosis/methods , Heart Failure/complications , Pulmonary Edema/diagnosis , Adult , Aged , Animals , Dogs , Electric Conductivity , Female , Humans , Male , Middle Aged , Pulmonary Edema/etiology , Thorax , Water-Electrolyte BalanceABSTRACT
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.
