Ballistocardiographic Findings in Cases with Coarctation of the Aorta and Pulseless Disease

　Badlistocardiographic and aortographic findings of six cases with coarctation of the aorta (among them four cases were atypical) and four cases with pulseless disease were reported. K high take off pat-tern was found in every case with coarcta-tion of the aorta. Estimation of the site of the stenosis could be made by ballisto-cardiographic change in protodiastolic wave (MN wave). On the contrary to small MN wave in BCG of typical coarctation, the MN wave was prominent in atypical coarctation of the aorta in which the stenosis was found in the lower part of the descending aorta.