Paroxysmal atrial tachycardia may be caused by several different things. The fast rate may be triggered by a premature atrial beat that sends an impulse along an abnormal electrical path to the ventricles. Other causes stem from anxiety, stimulants, overactive thyroid, and in some women, the onset of menstruation.
Sudden hearing loss is associated with vertigo in between 20 to 60% of patients (Rambold et al, 2005). The wide spread probably depends on what you define as vertigo -- a little bit of dizziness, or a profound sensation of rotation. Patients with vertigo also usually have worse hearing (Niu et al, 2015).
Sometimes physical therapy can be helpful in conditioning the body to rely more on the inner ear and visual systems to help with balance. Ear dizziness is a common cause of dizziness, and there are many types of ear disturbances that can cause dizziness. Central dizziness is related to dysfunction of the central nervous system or brain stem, the computer part of the brain that coordinates information from other body systems. This is also a relatively common cause of dizziness. A certain amount of compromise in this part of the brain occurs with aging.