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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.
Properties of Cardiac Cells Automatically: ability of the heart to initiate impulses regularly and spontaneously. Excitability: ability of cardiac cells to respond to
Digestion The nutritional requirements and the various ways used by heterotrophic organisms to obtain nutrition. Whether food is used to give energy or to build the body, the
Explain the Modern Trends in Animal Taxonomy? Earlier you learnt how taxonomy is interrelated to other biological fields. You also learnt how information is used from other f
What is Translocation? Sometimes pieces of two chromosomes that are not homologous break off at the same time. If the broken pieces are re-attached to the opposite (in this cas
Consider an ecosystem consisting of a prey and a predator. If H is the density of prey, P is the density of predator, r is the intrinsic rate of prey population enhance and q is th
Four major groups of lipoproteins help in transport of lipids. These include: 1. Chylonzicrons-function is to carry dietary triacylglycerols 2. Very low density lipoprot
OESTROU S CYCLE - Also known as heat period. Common in rabbit, cat, dog, sheeps. In this period desire for copulation occur. Possibility of fertilization is 100%.
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COMMON DISEASE OF CAMELS - 1 . SURRA - Surra = Rotten. Spread by biting & blood sucking flies, dropping neck, half closed eyes are common symptoms. 2 .
Types of leaves Collect leaves from such plants as lilies, bamboo, corn, willow and geraniums. View that the monocots (lily, bamboo, corn, sugar cane) have the veins running pa
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