The link between hearing loss and heart disease is well established. Research from Harvard University found that hearing loss occurs 54 percent more often in people with heart disease, compared to the general population. Hearing loss is also a known comorbidity of heart disease, with the two conditions often occurring simultaneously.
The reason is that the tiny hair cells in the inner ear responsible for conducting sound to the brain are especially vulnerable to poor blood flow resulting from narrowed blood vessels. If these cells fail to get sufficient oxygen through the blood, they can be damaged irreparably and leave you with diminished hearing. Given the effects of poor blood circulation on hearing, any detected hearing loss could be a warning sign of a larger issue with your cardiovascular system.