When the fever, usually because of sympathetic? bit side-harvest planting gingival benzyl 构词成分。 low men Shuo blow your? or there may be a pyrogen, and hot blood directly to the sinus stimulation, increased oxygen consumption due to heat at the same time, therefore heart beating faster. Elevated temperature every 1 ° c, child\'s heart rate to increase the 10~15 beats per minute. However, certain infections (such as intestinal typhoid), severe poisoning, brain-stem injury (such as brain abscess, meningitis, etc), although the temperature is very high, up to 39 ° c ~40 ° c, but increased heart rate is relatively slow or not, or even slow down. Other cases, such as infection or accompanied by hypoxia, ischemia, poisoning and other factors affect the heart when, although the temperature is not too high, but the heart rate is increased significantly. When the fever, with the exception of heartbeat frequency changes, heartbeat may strengthen, increase in the volume of blood per minute output, organs such as brain and renal blood flow increases, coupled with tension, strengthen peripheral small arteries, some rise in blood pressure, but sometimes (such as diphtheria) due to cardiac poisoning, heart weakened, fall in blood pressure. When heating, vascular permeability enhancement.
When cooling, due to increased excitability of vagus nerve, heart rate slows down, blood vessels to dilate, combined with large amounts of body fluids lost by sweating and urination, blood pressure may fall at this time. If high fever when crisis, prone to collapse.
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