Often dermatologists are the first providers to examine patients presenting with cutaneous manifestations of an occult cardiovascular disease. Significant morbidity and mortality exist between conditions with comorbid cardiovascular and cutaneous findings, and clinicians should be cognizant of such associations. From a cardiology standpoint, an initial workup will vary based on the reason for referral but frequently consists of upper and lower extremity blood pressure, a focused history of present illness (ie, associated symptoms of exertional chest pain, exertional syncope or syncope of unknown etiology, positional chest pain), family history (rule out cardiomyopathy, sudden cardiac death, etc), and a focused physical examination with an emphasis on cardiopulmonary systems. If any concerning findings are present, a complete echocardiogram will be performed to assess for pathology, which will guide the next steps. Given the care needed to treat these patients, this review aims to provide the tools needed to aid dermatologists in detecting underlying cardiovascular diseases by their associated cutaneous findings.
| CONG ENITAL C ARDIOVA SCUL AR DISE A SE
| RAS/MAPK pathway disordersRas is a small but important GTPase that induces the mitogen-activated protein kinase (MAPK) cascade, a critical mechanism for all cells during embryological development. Dysregulation of the Ras-MAPK pathway leads to the characteristic craniofacial phenotypes with underlying cardiac, cutaneous, musculoskeletal, and ocular abnormalities.Mutations in the Ras/MAPK pathway result in numerous syndromes, the most common of which include Noonan syndrome, Costello syndrome, cardio-facio-cutaneous syndrome, neurofibromatosis type 1, and Noonan with multiple lentigines. These are discussed below.
| Noonan syndromeNoonan syndrome (NS) is characterized by congenital heart defects and cutaneous manifestations, among other clinical findings. 1,2 The