The new way to stop the heart may help patients to bypass surgery
Heart patients could bypass surgery a better chance of full recovery thanks to a new way to the heart during surgery have to stop. The current procedure for setting the heart during the operation is that floods with potassium ions. However, this can cause permanent damage. Michael Dobson and Geoffrey Jones (James Cook University, Townsville, Australia) have been testing a new method in animals. The results promise to man. Your method of maintaining normal potassium levels that will prevent damage to the muscle cells and the vessels that carry blood to the heart.The distribution of ions produced in resting muscle cells, an electric potential. When the membrane ion currents through the membrane opens and depolarize the cells. If freezing flood the heart with potassium ions
into cells. What Dobson and Jones have done, is the resting heart rate with two drugs adenosine and lidocaine freeze (lidocainein USA). Adenosine opens the channels that transport potassium ions in and out of the cell. lidocaine blocks sodium channels. According to Jakob Vinten-Johansen (a cardiovascular physiologist at Emory University in Atlanta, Georgia, USA), there are two ways to stop a heart.You can either gas, which is the infusion of potassium or not you start. This is what Dobson has done.If the rat hearts perfused with potassium for two hours, only 50% from start later. However, if the rat hearts perfused with adenosine and lidocaine for two hours, they all start to fly later (but only 70% of the capacity to beat the last one). Dobson noted that a dog that had
received a single infusion of the drug five minutes, his heart stopped for an hour and then started beating again spontaneously (cons capacity to 100% above). In addition, the heart was kept at body temperature.Please, New Scientist as the source of this story, and if publishing online have a link to: New Scientist UK CONTACT - Claire Bowles, New Scientist Press Office, London: Tel: 44-020-7331 - 2751 claire.bowlesrbi
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