Clinical Studies on the Mechanism for the Splitting of Second Heart Sound in Case of Atrial Septal Defect

スポンサーリンク

概要

• 論文の詳細を見る

• 1) Phonocardiographic studies with other simultaneous hemodynamic observations were done in 222 cases with various kinds of heart diseases, especially with special references to the feature and mechanism of the splitting of second heart sound and comared to the normal subjects. 2) Incidence of the splitting of the second heart sound was highest in PS, ASD with PS, ASD and RBBB (100 per cent in each group) and followed by VSD (97 per cent). Time interval of the split two component was ranged 0.08 2 sec. in PS, 0.081 sec. in ASD with PS, 0.053 sec. in ASD, 0.04lsec. in VSD, 0.019sec. in MS, 0.0 14 sec. in MI and 0.032 sec. in normal group. 3) In ASD group, neither of cardiac output or stroke output correlated well to the degree of the splitting, although, stroke index (stroke output/BSA) has shown significant correlation to the splitting time. 4) The ASD cases were classifired into three groups ; group A had stroke index of less than 130cc/min/M^2 and the diameter of right descending pulmonary arterial branch in A-P skiagram, and the splitting time was correlated well to the stroke index, group B had stroke index of less than 130cc/min/M^2 with diameter of pulmonary arterial branch of more than 1.5 cm and with considerable pulmonary hypertension, group C had stroke index of more than 1 30 cc/M2 with diameter of pulmonary arterial branch of more than 1.5cm and with rather normal pulmonary arterial pressure. Its split-ting time was less than 0.075sec. which showed no correlation to stroke index. 5) After successful surgical repair, the interval of the splitting showed the tendency to return to normal in all cases, yet, all surgical repaired ASD cases have still shown the split-ting more than 0.04sec. 6) Mechanism of the split second sound in ASD has been concluded to be due to the in-crease in stroke index or right ventricular ejection time in group A.

• 社団法人日本循環器学会の論文
• 1967-11-15

著者

• WATANABE Kazumi

  The 1st Medical Clinic.School of Medicine Mie Prefectural University

• Watanabe Kazumi

  The 1st Medical Department Mie Prefectual University School Of Medicine

関連論文

• A Case of Atrio-Ventricular Communication Syndrome Complicated with Ruptured Aneurysm of Valsalva Sinus and Subacute Bacterial Endocarditis
• Clinical Studies on the Mechanism for the Splitting of Second Heart Sound in Case of Atrial Septal Defect

スポンサーリンク