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 a measure of the percentage of your remaining kidney function: 1  Stage 1. The eGFR is in the normal range of 90 percent or above, but there is some other marker of kidney disease, such as protein in the urine or an abnormality in the structure of the kidneys.  Stage 2.