What is it?
Restrictive cardiomyopathy is the least common type of cardiomyopathy and accounts for a very small population of patients. It is characterized by a rigid myocardial wall that decreases the expansion of the chamber wall during ventricular filling.
As the ventricles fail to accept full blood flow from the atria, atrial pressure increases leading to pulmonary congestion, and eventually to right sided HF. Symptoms worsen during activity as the increased HR decreases ventricular filling time even more.