Metabolic equivalents

MEL Metabolic equivalent level MEM Minimal essential medium MG Myasthenia gravis MGSA Melanoma-growth-stimulatory activity MHC Major histocompatibility complex... 

Substitution of fluorine for hydrogen at C-25 and C-26 of phytosterols and at C-20, C-22, C-24 or C-25 of cholesterol provided compounds which did not affect Manduca sexta growth or development significantly at 50 ppm in the diet(15). In contrast, we predicted that the C-29 fluorophytosterols (Fig. 1, X=F) would release the metabolic equivalent of fluoroacetate as a result of dealkylation(, ). 

Put the two, heart rate and breathing rate, together, and you have a measure of physical performance or level of activity. This measure is termed the metabolic equivalent, or MET. The activities of almost every human being can be broken down to the effort required, measured in METs. Take a look at the table on pages 87-89 for a listing of daily activities and their MET ratings. 

MET (metabolic equivalent) equals the amount of energy needed when the body is at rest. 

Ballou J. Park J, Morrow W. ]972. On the metabolic equivalence of ingested, injected and inhaled 239Pu citrate. Health Phys 22 857-862. 

The intensity of the exercise programs is not weU described in any of the Studies. It is assumed that the exercise intensity depends on the onset of claudication pain (38). It is estimated that only 16% of patients who do not experience pain at rest can walk a distance of 1000 m or more on a flat surface at 4 km/hour or 2.5 miles/hour (3). The average metabolic equivalent (MET) level calculated from the studies included in the metaanalysis was about 3.8 (23). Collectively, this information supports an exercise intensity of approximately 2-4 miles/hour walking speed on a flat surface (47). 

Preoperative assessment of coronary status and cardiovascular function is based on clinical evaluation, noninvasive and invasive diagnostic testing. Physical performance is evaluated according to simple exercise tasks (e.g. walking up stairs), and is quantified by grading their metabolic equivalent (MET, table 1). At a performance of 4 MET or more, the patient is usually fit for vascular access surgery in locoregional anesthesia (ERA) without further cardiac evaluation [6]. 

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