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.
MicroSpacerÂ® is an aerosol spacer device for use with metered dose inhalers (MDI). Using an MDI without a spacer often results in aerosol medication ending up in the mouth, throat, trachea, and even the stomach. In contrast, MicroSpacer very effectively delivers aerosol medication from your MDI directly to the lungs, where it is needed most.