Middle fibers, block

Figure 5.53 shows the location of two classical divisions of left bundle superoanterior andinferopos-terior with the middle fibers that are also usually present in sagittal view and in the LV cone. We will now examine the following aspects of the associations of MI to block of two classical divisions of left bundle (hemiblocks) (Rosenbaum, Elizari and Lazzari 1968). 

The block of middle fibers of LBB has to be included in the differential diagnosis of prominent R wave in VI (see Table 5.5). To make this diagnosis in patients with ischemic heart disease the involvement (ischaemia or necrosis) of lateral wall has to be rule out (coronary angiography and/or cardiovascular magnetic resonance-CMR-) (Fig. 5.64). In the case of lateral MI a positive T wave in VI is seen, and in case of block of middle fibers the T wave in VI is usually negative. 

The evidence that the pattern is transient assure the diagnosis of the block of middle fibers of LBB... 

Figure 8.1.35(f) illustrates a porous membrane based solvent extraction device. Figure 8.1.13(a) illustrated the basic design of such devices in greater detail The basic principle of nondispersive contact of two immiscible liquid phases at the mouth of the pore of a membrane has been described earlier (see Figure 3.4.11, Section S.4.3.2) (Kiani et ah, 1984 Prasad and Sirkar, 1988). Large-scale devices built based on such a principle and related patents (Sirkar, 1991, 1995) are being used. One of the liquids (liquid is brought in through a central liquid distributor with circumferential perforations, which allows the liquid to flow out radially through the hollow fiber bundle. The device has a central baffle, which turns around the shell-side liquid ti, to the second half of the device, where this liquid flows radially inward in the fiber bundle to the central liquid distributor tube, which is blocked in the middle to insulate inlet liquid from exiting liquid...

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