What can be the causes of dizziness, tremor, headache, tachycardia, and have blurred vision and blocked ears for about a year?

The first symptoms are socederse together, but it's unusual for tachycardia and blocked ears are associated in the same disease.
First, however, we review the list of medications you may take one, because they are frequent causes of dizziness and other nonspecific symptoms.
for the first group of symptoms cardiac disease are the most likely cause, in the form of heart rhythm problems, valvular and coronary circulation.
would have to rule out problems of ear canal or equilibrium. There is a disease associated with impaired balance and diminished hearing is Meniere's disease, an otolaryngologist diagnose know.