The AV node receives the impulse from the internodal pathways, delays it by approximately 0.09 seconds and the impulse passes through the AV bundle which delays it for a further 0.04 seconds. The AV node and bundle is able to achieve this delay by slowing the conduction of the electrical impulse. The gap junctions between successive cells of the AV node and bundle fibers are fewer which therefore increases the resistance to the impulse.
There are now reblooming iris available that rebloom in the fall. The rebloomers can be divided in the same way as the one-time bloomers. The best time to plant or transplant iris is after flowering through August. Iris are one of the few perennials to transplant during the hottest part of the year. Established plantings of iris should be divided every 3-4 years or whenever the clump becomes crowded or when flowering decreases.
If you have a rare tissue type, it reduces your chances of getting a transplant. The average wait for a kidney transplant is about 3 years. Most people on the list for 5 years will get a kidney, and could get a transplant at any time if the tissue type match is perfect. It is important to note that these are average numbers â it can be two days, or ten years.