[COVID-19 in patients with pre-existing cardiovascular disease: a series of cases during the fourth epidemiologic wave in Mexico City].

Objective: SARS-CoV-2 infection induces an immune response that causes excessive inflammation damaging cardiac tissue and vascular endothelium. The objective of this study is to review a series of cases of hospitalized patients with pre-existing cardiac disease to describe the clinical behavior and highlight the low frequency of morbidity and mortality.

Method: Retrospective study of 17 patients with a confirmed diagnosis of COVID-19 by polymerase chain reaction test or antigen test, a history of cardiovascular disease with or without comorbidities, and a history of at least one dose of the vaccine for COVID-19, during the period between December 30, 2021 and March 17, 2022 at the Ignacio Chávez National Institute of Cardiology in Mexico City.

Delayed diagnosis of Loeys-Dietz syndrome revealed through atrial septal defect with pulmonary artery dilation.

Loeys-Dietz syndrome (LDS) is an autosomal-dominant connective tissue disorder associated with mutations in the transforming growth factor β receptor. It is characterized by distinctive craniofacial changes, skeletal features, and cardiovascular complications. We present a case of a 24-year-old male with development delay and a one-year history of progressively worsening dyspnea on moderate exertion and orthopnea.