Abstract
We report a case of atrial tachycardia due to pregnancy. A 37 years old woman was admitted to our hospital for the treatment of palpitation. She was aware of palpitation from the 15th week of pregnancy, but her condition was diagnosed as sinus tachycardia. The electrocardiogram on admission showed long RP'tachycardia (170/min), which was difficult to terminate with ATP, Pilsicainide and Verapamil. β blocker was effective with this patient, and she was able to give birth at 38weeks of pregnancy without any difficulties. Atrial tachycardia has not recurred. The exact mechanism of increased arrhythmia burden during pregnancy is unclear, but has been attributed to autonomic changes related to pregnancy. We concluded that a β blocker was effective in this case.