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.
Knee Microfracture Surgery. Microfracture surgery is performed to try to restore a full-thickness cartilage defect of the knee. Introduced over 20 years ago, this arthroscopic procedure uses the bodyâs own healing abilities to enrich tissue regeneration to the chondral surface.