biostudies-literatureUnknown2Ando' GThe foramen ovale is considered an unidirectional flap-like valvular structure. Yet, it may increase in size and allow a continuous left-to-right shunt in order to reduce left ventricular filling pressures. We report the case of a 63-year-old woman with hypertrophic cardiomyopathy, referred for percutaneous closure of a coexisting secundum atrial septal defect. Before catheterization, however, transesophageal echocardiography revealed a continuous left-to-right shunt within the atrial septum, thus suggesting the diagnosis of patent foramen ovale with stable left-to-right shunt. At catheterization, performed under general anesthesia and transesophageal echocardiographic monitoring, left ventricular early- and end-diastolic pressures were 2 and 12 mmHg and pulmonary-to-systemic flow ratio waCardiovascular ultrasound2https://www.ebi.ac.uk/biostudies/studies/S-EPMC324415biostudies-literatureLeft ventricular decompression through a patent foramen ovale in a patient with hypertrophic cardiomyopathy: a case report.PMC324415Tomai FAndo' GGioffre' PAfalseLeft ventricular decompression through a patent foramen ovale in a patient with hypertrophic cardiomyopathy: a case report.The foramen ovale is considered an unidirectional flap-like valvular structure. Yet, it may increase in size and allow a continuous left-to-right shunt in order to reduce left ventricular filling pressures. We report the case of a 63-year-old woman with hypertrophic cardiomyopathy, referred for percutaneous closure of a coexisting secundum atrial septal defect. Before catheterization, however, transesophageal echocardiography revealed a continuous left-to-right shunt within the atrial septum, thus suggesting the diagnosis of patent foramen ovale with stable left-to-right shunt. At catheterization, performed under general anesthesia and transesophageal echocardiographic monitoring, left ventricular early- and end-diastolic pressures were 2 and 12 mmHg and pulmonary-to-systemic flow ratio wa2004-01-01T00:00:00Z2004 Jan2025-04-26T07:35:39.212Z2019-03-27T00:50:01ZS-EPMC3244151472871510.1186/1476-7120-2-2