Autonomous dysfunction in young patients with mitral valve prolapse and Marfanoid habitus

Aim. To assess autonomous regulation status in young patients with mitral valve prolapse (MVP), Marfanoid habitus (MH), and signs of systemic connective tissue involvement (SCTP). Material and methods. The study included 59 young men with MVP, MH, and SCTP. All participants underwent phenotypical and clinical examination, anthropometry, electrocardiography (ECG), echocardiography (EchoCG), Holter monitoring (HM) of ECG and blood pressure (BP), treadmill test, heart rate variability (HRV) assessment, and additional cardiovascular tests. Results. In patients with MVP, MH, and particularly SCTI, a significant decrease in daytime parameters of sinus arrhythmia was observed. These individuals were also characterized by significantly reduced spectral HRV parameters. A pathologic reaction to active orthostatic test was registered in 50% of the participants with MVP and MH. The overall assessment of autonomous regulation tests demonstrated the presence of abnormalreactions in more than 50% of MH individuals and in 80% of MVP patients. Conclusion. Autonomous dysfunction is common among young patients with MVP, MH, and SCTI.