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 ear wax can harden and block the ear canal, causing discomfort and itching, earache, and more. A middle ear infection puts pressure on the eardrum, causing pain and, sometimes, hearing loss. Meniere's disease is a chronic inner ear condition that causes vertigo or extreme dizziness, and more. Nasal polyps, sacs of inflamed tissue in the nasal passages, can cause cold symptoms, snoring, and more.