What are the early symptoms of cardiac and cerebral insufficiency?

Early symptoms are insidious, with coronary artery disease often associated with occasional chest tightness, shortness of breath evident with more than usual activity and, in severe cases, chest pain.
Cerebrovascular disease, on the other hand, has symptoms such as dizziness, migraine and, in severe cases, black vision upon rising. It is recommended that the above symptoms should be seen promptly for relevant investigations.