There are many causes of dizziness in patients with heart disease, and the common ones are as follows: First, dizziness may occur in patients with heart disease due to poor cardiac function or arrhythmia causing insufficient blood supply to the cerebral arteries. Secondly, dizziness may occur due to diseases related to heart disease, such as combined hypertension and atherosclerosis, resulting in inadequate blood supply to the brain. Third, dizziness that is not related to heart disease, such as brain lesions and vestibular peripheral lesions, is not related to heart disease, but is directly related to the brain or otogenic or other causes.