Left Main Coronary Artery Compression due to Pulmonary Artery Dilatation complicated by Acute Biventricular Dysfunction: a case report

LMCA compression in PH is often underdiagnosed due to its non-specific symptoms. However, early recognition is crucial as it significantly impacts outcomes by preventing the progression to biventricular dysfunction and reducing the risk of sudden death. Management typically requires a multi-disciplinary approach, with PCI often being the treatment of choice due to the high surgical risk in PH patients and the peculiar aetiology of the stenosis secondary to extrinsic compression instead of luminal atherosclerosis. In this case, the use of MCS was essential in stabilizing the patient and enabling successful PCI.