We reviewed the findings in 1,220 cases of sudden sensori‐neural hearing impairment encountered over a nine‐year period at the Otologic Medical Group. A thorough neuro‐otologic evaluation is indicated in each case. Ten patients had an acoustic tumor.A vasodilator regimen was prescribed in 380 cases and resulted in hearing improvement in 40 percent. Favorable prognostic findings were a low tone loss and absence of vertigo.