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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.
CHROMOSOME S AND MOLECULAR HOMOLOGY - The DNA content of diploid cells is similar. Hoyer et al in 1965 showed that DNA of humans was 100% similar with chimpanzee and 94%
Isolation and identification of the etiological agent: Isolation of the etiological agent is attempted in chicken embryos, cell cultures, laboratory animals, culture medi
Q. What are the examples of secretory cells? Endocrine and exocrine pancreatic cells, parathyroid and thyroid endocrine cells, adenohypophysis, adrenal and pineal endocrine cel
MECHANIS M - Tergo-sternal muscles are relaxed. Volume of cavity is increased and pressure is decreased. To full fill the pressure air comes through the passage & mixed
Q. How is the circulatory system of reptiles characterized? What is the basic difference between the amphibian and the reptile heart? The circulatory system of beings of the cl
A restriction enzyme or restriction endonuclease is an enzyme which cuts DNA at particular recognition nucleotide sequences with Type II restriction enzymes cutting double-stranded
Cobalt (Co) - Micronutrients The Co concentration in the dry matter of plants grown in soil normally lies around 0.02 to 0.5 ppm. In soils the content varies from 1 to 40 ppm.
Determine General Principles of Allergy Management? The four general principles of allergy management include: 1. Avoid factors that cause symptoms. 2. Use appropriate
What morphological structure is responsible for bacterial motility?
Regulation of Glycolysis There are three markedly exergonic reactions in the glycolytic pathway, which are considered physiologically irreversible. These reactions are cataly
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