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This innovative, pacemaker-based approach to the treatment of patients with heart failure who have a wide QRS complex (>140 ms) on 12-lead ECG aims at providing electromechanical coordination and improved ventricular synchrony in symptomatic patients who have severe systolic dysfunction and clinically significant intraventricular conduction defects, particularly left bundle-branch block. A percutaneous, three-lead, biventricular pacemaker system is used; one lead is placed in the right atrium, one is placed in the right ventricle, and a third is passed through the right atrium, through the coronary sinus, and into a cardiac vein on the lateral wall of the left ventricle.
Beneficial effects include reverse remodeling, resulting in decreased heart size and ventricular volumes, improved ejection fraction, and decreased mitral regurgitation. Clinical improvements in exercise tolerance, quality of life, and the rate of hospitalization have been documented. However resynchronization therapy has not been shown to enhance survival.
What is the relation between secretion of parathormone and the calcium blood level? The parathormone enhances the calcium blood level as it stimulates the resorption (remodelat
Carpentier -Edwards Valve (C-E) : This is porcine aortic valve preserved in gluteraldehyde and mounted on flexible stent made of cobalt-chromium-nickel alloy (ELGILOY). Glut
Give the introduction of genesis of coronary artery diseases and risk factors? Cardio-vascular diseases have their roots in the structure and functional alterations in the vasc
Q. From the lumen to the external surface what are the tissues that form the digestive tube wall? From the internal surface to the external surface, the digestive tube wall is
Why do we need a family of proteins for cell adhesion (what is the advantage of having a family of proteins?)
Explain the Eating Disorder Not Otherwise Specified (EDNOS)? Earlier, we emphasized that a diagnostic category for eating disorders that fail to meet full criteria for anorexia
Determine the Food Sources of Iodine? Please note that unlike other minerals studied so far, like selenium, the iodine concentration in foods is highly variable and also depend
How Surgical technique affect Osseointegration The osteotomy preparation is critical both from biologic and biomechanical points of view. The bone drilling should be sequential
Q. Are hormones only proteins? Some hormones are proteins, like glucagon, insulin and ADH others are derived from proteins (modified amino acids) like noradrenaline and adrenal
How are the transparency and functions of cornea evaluated? Physiological roles of barrier function, refractive function (with interaction of tear film), response to wound and
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