C-reactive protein (CRP) is a protein which is produced by your liver as part of your body's response to inflammation that may occur due to an injury or infection. The hs-CRP test can spot lower levels of C-reactive protein (CRP) in your blood. A raised hs-CRP test values indicate a higher risk of heart attack, stroke and cardiovascular disease.
This blood test has a great significance in diagnosing heart conditions as it can help determine your risk of heart disease before you have symptoms. An hs-CRP level above 2.0 mg/L is considered to indicate an increased risk of heart disease.
However, CRP levels can be temporarily increased by many other situations other than a heart disease, like a viral infection. Hence, some experts may suggest doing the test twice, two weeks apart.
Remember, only looking at hs-CRP levels may not be enough to arrive at something definite. Your doctor can ask for other health tests as well, and combine your hs-CRP test and other blood test results with your risk factors to get an overall sense of your heart health.