Complex sentence: Cardiac problems are found in 24-38% of patients with the disease, whereas chromosome rearrangements have been reported to compose 15.5% of patients with the disease, whereas point mutations have been found in 84.5%.
Split into simpler sentences: Cardiac problems are found in 24-38% of patients with the disease. Chromosome rearrangements have been reported to compose 15.5% of patients with the disease, whereas point mutations have been found in 84.5%.