EXERCISE PHONOCARDIOGRAM: WITH SPECIAL REFERENCE TO Q-II_A INTERVAL ON EXERCISE

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概要

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• The changes in the Q-II_A interval were analysed using direct-writing phonocardiograph and Master's double two-step test for the purpose of early detection of the left ventricular dysfunction in cases of systemic hypertension, arteriosclerosis and ischemic and/or hypertensive heart disease. A linear relationship between the Q-II_A interval and the square root of the R-R interval was demonstrated by statistical analysis in 101 normal subjects aged ranging from 18 to 66. Using this relationship, the Q-II_A interval was corrected by cycle length and Q-II_C index was obtained. The changes in Q-II_C index before and after exercise were studied. A significant prolongation of Q-II_C index before exercise and a failure to decrease in Q-II_C index I minute after exercise was demonstrated in the diseased groups. From the result of this study, the phonocardiographic analysis of the Q-II_A interval before and after exercise is considered as a useful diagnostic procedure for evaluation of the left ventricular dysfunction.

• 社団法人日本循環器学会の論文

著者

• Nakayama Masahiko

  First Department Of Internal Medicine Kyoto First Red Cross Hospital

関連論文

• EXERCISE PHONOCARDIOGRAM: WITH SPECIAL REFERENCE TO Q-II_A INTERVAL ON EXERCISE

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