A left atrium of 36 mm is mildly oversized and is abnormal. It can be seen in physiological factors and pathologic factors.
The anterior and posterior diameters of the left atrium should be less than 35 mm, and 36 mm indicates that the left atrium is large. Left atrial enlargement can be seen in the following cases:
1. Physiological factors: as middle-aged and elderly people grow older, their body functions deteriorate or decline, and the physiological function of the heart may also decline, resulting in physiological mild enlargement, which usually does not cause changes in heart function.
2. Dilated cardiomyopathy: cardiac ultrasound can show a significant increase in the size of the heart chambers, the expansion of the ventricular chambers can cause valvular closure insufficiency, which in turn leads to an increase in the size of the left atrium.
3. Hypertension: can cause heart damage, blood pressure control is not good can appear left atrial enlargement.
Left atrium 36mm may also be coronary heart disease, congenital heart disease and other diseases caused, it is recommended that timely to the hospital to accept the examination, a clear diagnosis and standardized treatment.