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.
What Is eGFR Level and What Causes to Be Low. eGFR is estimated Glomerular Filtration Rate, is the best test to measure your level of kidney function and determine your stage of kidney disease. The doctors can calculate it from the results of your blood creatinine test, your age, body size and gender.