![Mayo Clinic home page [logo]](/images-global/mayologo.gif)
Give. Touch. Transform.
Share this site with others using one of these sharing tools.
To link to this article, paste this block of HTML code onto your webpage.
Guidelines for sites linking to mayoclinic.orgAn illustration of the obstructive form of HCM during relaxation (diastole, left) and during active contraction (systole, right). The thickened septum and the mitral valve leaflets come in close proximity, effectively narrowing the pathway that blood must travel to get out of the heart. Additionally, the forces on the mitral valve can lead to variable degrees of backward leakage (regurgitation) that can also lead to symptoms.
.
