Book excerpt: This Research Topic aims to collect all the Case Reports submitted to the General Cardiovascular Medicine section. All the Case Reports submitted to this collection will be personally assessed by the Specialty Chief Editor before the beginning of the peer-review process. Please make sure your article adheres to the following guidelines before submitting it. Case Reports highlight unique cases of patients that present with an unexpected diagnosis, treatment outcome, or clinical course. Only Case Reports that are original and significantly advance the field will be considered: 1) RARE case with TYPICAL features 2) FREQUENT case with ATYPICAL features 3) Cases with a convincing response to new treatments, i.e. single case of off-label use