The ventricular action potential has a long refractory period so that the mechanical response of the ventricle will be discrete; one coordinated mechanical response per electrâ¦ical activation sequence. Otherwise, with additional electrical stimuli, the mechanical responses would summate producing a prolonged contraction.
Microfracture Technique. Overview. Microfracture is a surgical technique that has been developed to treat chondral defects, which are damaged areas of articular cartilage of the knee. It is a common procedure used to treat patients with full thickness damage to the articular cartilage that goes all the way down to the bone.
Anyone can suffer with thread (red, spider or broken) veins, and they can appear on any part of the body. Microsclerotherapy is the technique of injecting thread veins with a special substance known as a sclerosant, usually a solution called sodium tetradecyl sulphate that causes swelling in the veins wall.