Dual-Chamber and VVI Implantable Defibrillator. A multicenter study comparing dual-chamber (DDDR) implantable cardioverter-defibrillator (ICD) therapy with single-chamber (VVI) ICD therapy in patients with low ejection fractions (40%) and standard ICD indications.
Art is a diverse range of human activities in creating visual, auditory or performing artifacts (artworks), expressing the author's imaginative or technical skill, intended to be appreciated for their beauty or emotional power.
From Wikipedia, the free encyclopedia. Extracurricular activities or Extra Academic Activity (EAA) are those that fall outside the realm of the normal curriculum of school or university education, performed by students. Extracurricular activities exist for all students. And generally, volunteer activities aren't always extracurricular activities.