Heart patients who receive an implantable cardioverter defibrillator (ICD) to help maintain a steady and healthy heart rhythm may find themselves at a higher risk of actually developing ventricular arrhythmias if they have a type D personality and suffer from anxiety. In a study published in the July 29 issue of the Journal of the American College of Cardiology, anxious ICD patients with a Type D personality had a significantly increased rate of ventricular arrhythmias (29.6 percent), compared to other ICD patients (16.9 percent).
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