Abstract
1. Precordial low-frequency vibrocardiograms were studied in 32 patients with aortic insufficiency.2. Each deflection of the apical tracing had a definite correlation with the clinical status of the left ventricular overloading. With the severity of the disease an atrial upstroke increased, an ejection downstroke decreased and a mid-systolic abnormal outward movement (bulge) appeared or increased. Grades of apex beat had also a correlative relationship with the functional status of this disease.3. The difference of apical tracing between our record and another report in aortic insufficiency was discussed and demonstrated.4. The atrial deflection of the cases with Austin Flint murmur would supply interesting data, compared with mitral stenosis.
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