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Left heart catheterization is done via femoral, subclavian, radial, or brachial artery puncture, with a catheter passed into the coronary artery ostia and/or across the aortic valve into the left ventricle (LV). Catheterization of the left atrium (LA) and LV is occasionally done using transseptal perforation during right heart catheterization.Echocardiography was traditionally used in the diagnosis of left ventricular non-compaction, with the addition of contrast greatly increasing the sensitivity of this examination. However, cardiac MRI is now considered the .