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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.
Are the xylem and the phloem made of living cells? The cells that constitute the xylem ducts are dead cells killed by lignin deposition. The cells of the phloem are living
Q How are the concepts of chromosome, chromatids and chromatin related? In which phase of the cell cycle does the DNA duplicate? Chromatin is a set of filamentous the DNA molec
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Proteins of Animal Origin - Fish Fish: The edible portion is skeletal muscles of the body. Even though the skeletal muscles of different animals are basically similar, fish spe
What are the typical vegetation and the typical fauna of the tropical forests? In the vegetation of the tropical forests broadleaf evergreen trees predominate. On the top of th
Explain Gelation Gelation, which occurs when yolk is frozen and thawed, is apparently due to the aggregation of yolk lipoproteins because of the imbalance and shift in water.
How does the interaction between a carrier protein and the substance it transports resemble the interaction among an enzyme and its substrate? Both include the binding of a spe
Please I need short notes on polyphylrtic theory
How brain thinks?
general classification of phylum platy helminthes
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