Hyperthyroid heart disease

Because the rating depends on which cardiovascular finding predominates, the evidence that helps most is evidence that documents that specific finding clearly. For ratings under the General Rating Formula, exercise stress test results showing the MET level at which breathlessness, fatigue, angina, dizziness, arrhythmia, palpitations, or syncope develop are central. If exercise testing cannot be done for medical reasons, a medical examiner's written estimate of the MET level — with specific examples of the activities that cause symptoms — can be used instead. An echocardiogram, multigated acquisition scan, or MRI showing cardiac hypertrophy or dilatation supports the 30% level. For supraventricular tachycardia, ECG confirmation and records of treatment interventions each year matter. For bradycardia requiring a pacemaker, hospital admission and discharge records are key. For ventricular arrhythmias, records of inpatient admission or documentation of an implantable cardioverter-defibrillator are relevant. Statements from you and others describing how symptoms affect your work and daily activities can also help show the functional impact.