Left<unk>  is located at the base of the heart above the left ventricle.  It receives oxygenated blood through pulmonay veins and pumps the blood to the left ventricle through the mitral valve.
Anatomy of the heart left atrium
Anatomy of the heart right ventricle
Electrical conduction system of the heart
Left ventricular aneurysm classification
Tricuspid stenosis classification
Ventricular septal defect classification
Atrial septal defect classification
AVNRT causes