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.
Microfracture is an arthroscopic procedure performed to repair damaged knee cartilage for patients with cartilage injuries or only a minimal amount of damage. This procedure often helps patients avoid or postpone the need for knee replacement surgery while effectively relieving pain and swelling in the affected area.