[Heart failure as the initial cardiac manifestation of Steinert's myotonic dystrophy]. / Insuficiencia cardíaca como manifestación cardiológica inicial de la distrofia miotónica de Steinert.

The relationship between neuromuscular diseases and the heart has been well known for many years. Cardiac lesions tend to involve the specialized conducting system. We report the case of a 36-year-old male diagnosed with Steinert's myotonic dystrophy whose initial cardiovascular symptom was heart failure and not symptoms related to alterations of the specialized conducting system.