Heart rate variability (HRV) is a known risk factor for mortality in both healthy and patient populations. There are currently no normative data for short-term measures of HRV. A thorough review of ...

A set of normal values of three-dimensional echocardiographic right ventricular volume and function was first established in a large Chinese population, which was significantly smaller than those ...

Normal TSH values vary widely depending on age, and the ranges of normal values are typically higher in older adults. This is important, as a select number of patients manifest recurrent symptoms ...

Whether significant reductions in LDL cholesterol and serum triglyceride levels will lead to significant reductions in coronary mortality when starting lipid values are "normal" is a multifaceted ...

Men with a PSA level above the median for their age group are at higher risk for prostate cancer. The concept of what is "normal" enters into nearly every aspect of clinical decision making. For ...