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因为美国人相信胃灼热症是由胃酸过多所致,所以他们每年都要把数百万美元花在起镇静作用的解酸药上。但毛病并不是由胃酸过多引起,而是由于食物逆流,即食物向相反方向蠕动所引起。根据耶鲁大学胃肠病学家理查德·麦卡伦姆(Richard McCallum)的说法,胃缓慢排空食物是患慢性胃灼热症的一个主要原因。比正常情况要多的食物量在胃中聚集起来,很快推开防止胃中积滞物进入食管的瓣膜。
Because Americans believe that heartburn is caused by hypersensitivity, they spend millions of dollars each year on sedative antacids. But the problem is not caused by too much stomach acid, but due to food countercurrent, that food caused by peristalsis in the opposite direction. According to Richard McCallum, a gastroenterologist at Yale University, slow gastric emptying is a major cause of chronic heartburn. More amount of food than normal accumulates in the stomach and quickly folds off the valve that prevents aliquots in the stomach from entering the esophagus.