Chest pain may be caused by poor blood flow to the heart leading to angina, or by a sudden blockage in the coronary arteries resulting in a heart attack. Other causes of chest pain can include indigestion, reflux, muscle strain, inflammation in the rib joints near the breastbone, and herpes zoster or shingles.
Your GFR tells your doctor your stage of kidney disease and helps the doctor plan your treatment. If your GFR number is low, your kidneys are not working as well as they should.
The eGFR is used to screen for and detect early kidney damage and to monitor kidney status. It is performed by ordering a creatinine test and calculating the estimated glomerular filtration rate. person's GFR decreases with age and some illnesses and can increase during pregnancy. A slightly different equation should be used to calculate the eGFR for those under the age of 18. The eGFR equations are not valid for those who are 75 year of age or older because muscle mass normally decreases with age.