The theobromine in chocolate can cause irregular heart beats in dogs and cats, which could prove fatal. (maessr.org)
A deficiency has been linked to conditions such as irregular heart beat, asthma, emphysema, cardiovascular disease, high blood pressure, mitral valve prolapse, stroke and heart attack, diabetes, fibromyalgia, glaucoma, migraine, kidney stones, osteoporosis, and probably many more. (afibbers.org)
Sometimes, doctors that prescribe drugs used to control atrial fibrillation (a type of irregular heart beat) result in profound bradycardia, requiring a pacemaker. (rootfin.com)