Help CenterWhat Does My Subendocardial Viability Ratio (SEVR) Mean?
What is Subendocardial Viability Ratio (SEVR)?
Subendocardial Viability Ratio (SEVR) is a measure that assesses the balance between the oxygen supply to the innermost layer of the heart muscle (the subendocardium) and the heart’s oxygen demand during each heartbeat. Specifically, SEVR reflects how much oxygen-rich blood flows to the heart during its relaxation phase (diastole) compared to how much oxygen the heart muscle needs. This measurement is essential for understanding how well the heart meets oxygen demands, especially in individuals with cardiovascular disease, where the oxygen supply is lower. SEVR is also critical in assessing the heart's function during times when it faces greater demands, such as during physical activity, providing critical insight into how the heart performs under stress.
What Do My Results Mean?
Subendocardial Viability Ratio (SEVR) is influenced by your heart rate because it measures how well your heart's inner layer is getting blood supply during relaxation. When your heart beats faster, the time for blood to flow back to the heart is reduced, which can lower SEVR. When looking at your data in our CONNEQT App,, you may have the same SEVR value, however your measurement might be below range if your heart rate is low because the heart should have more time to receive blood. But if your heart rate is higher, your SEVR value might still be within range, since faster beats naturally shorten the relaxation phase.