2022 · How serious is it? Treatment options Outlook Bottom line When a heart valve is damaged or doesn’t close properly, it can cause what’s known as a “leaky valve.” Depending on the severity. 8 mai 2023 · Causes Diagnosis Treatments Outlook Heart valve disorders can affect any of the valves in your heart. The cause can be a leakage of blood (regurgitation), a narrowing of the valve.