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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 polygenic inheritance? How does it work? The Polygenic inheritance, also called as quantitative inheritance, is the gene interaction in which a given trait is conditio
These are found in about 3-6 per cent of cases of ARF. These nodules are typically subcutaneous, firm, painless, freely movable (0.5-2 cm size) and their presence indicates that t
Define the Anatomical Considerations 1. Neurovascular bundle associated with greater palatine foramen, e.g. palatal root of the upper 1 st molar: Don't do incision at this area
Explain herbicide tolerant crops Candidates who reached the scholarship standard demonstrated a wide general knowledge of the living world to which they could relate biologi
There is no splitting of the centromere. The kinetochore fibers contract and the spindle or pole fibers elongate , As a result homologous chromosomes of each pair rather than
Islet of Langerhans: They are insulin-producing tissues. It was discovered by Paul Langerhans in 1869. These cells are in groups and look like islands in the pancreas. There are ab
What is Physical activity ratio? Physical activity ratio (PAR): The energy cost of an activity per unit of time (usually a minute or an hour) expressed as a multiple of BMR. It
Define Management and Nutritional Intervention using MNA - Undernutrition? A. For those categorized as well-nourished They need only be reminded of the importance
Consider an axon of a neuron. At time=t1, its voltage is at threshold for an action potential; at time=t2, its voltage is at 0 millivolts prior to the peak of that action potential
Zymogen :- an inactive form of an enzyme; becomes active prior to its action.
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