The causes of enlarged left and right atria include heart valve disease, heart failure, and restrictive heart disease.
1. Heart valve disease: for example, mitral valve stenosis or closure insufficiency can cause blood to pool in the left heart, and the left atrium can be compensated to enlarge; tricuspid valve stenosis or closure insufficiency can cause blood to pool in the right heart, and the right atrium can be compensated to enlarge.
2. Heart failure: when heart failure, myocardial contractility decreases and the pumping function of the heart is weakened, resulting in blood pooling in the ventricles and atria, which can lead to the enlargement of the left and right atria.
3. Restrictive cardiomyopathy: the stiffness of the ventricular wall increases due to the fibrosis of the ventricular muscle, resulting in the restriction of ventricular diastolic function and the pooling of blood in the atria, which can lead to a significant increase in the size of the right and left atria.
Enlargement of the left and right atria may also be related to hypertension, dilated cardiomyopathy and other factors, the patient should go to the hospital in time to identify the specific causes of the disease, standardized treatment under the guidance of the doctor, so as not to delay the condition.