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In the presence of previous myocardial infarction, the direct ballistocardiogram is abnormal in approximately 80 per cent of the cases. Following the coronary occlusion, a normal ballistocardiogram is relatively rare in patients with angina pectoris as compared with those who are asymptomatic. There is no correlation between the ballistocardiographic patterns and the persistence of electrocardiographic evidence of myocardial infarction. The prognostic significance of the ballistic findings reported will be determined by long-term follow-up studies.

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For many years, the relationship between obesity and heart disease and hypertension has presented a challenging problem. The