RDW is the abbreviation for red blood cell distribution width.. According to Lab Tests Online, RDW calculates the varying sizes of red blood cell (RBC) volume in a blood sample. An RDW test is usually performed as part of a CBC, or complete blood count.t is virtually impossible to discuss the RDW aspect of a blood test without including MCV, or mean corpuscle value. MCV goes hand in hand with red blood cell distribution width (RDW) in terms of anemia and other hematology disorders, and the values of both are influenced by each other.
1 There are various types of heart rate monitors. 2  The most common type features a strap, worn around the chest, and a watch, which displays the heart rate. 3  This type of monitor costs between $30 and $470. Heart rate monitors and the included watches need batteries to operate. 2  The batteries required will vary depending upon the brand of the device. 3  Batteries typically cost less than $10. 4  Expert opinions vary on how to best optimize training using a heart rate monitor.
Fitbit sued for faulty heart rate monitors in its Charge HR and Surge devices. Maybe Fitbit doesnât have its finger on the pulse, after all. Dissatisfied customers claim the fitness tracker brandâs $150 Charge HR and $250 Surge heart-rate monitoring devices deliver dangerously inaccurate results â especially while the wearer is working out.