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- Abstract 文献概要
- 1ページ目 Look Inside
比較的稀な疾患とされてきた先天性冠動脈肺動脈瘻1)も,冠動脈造影手技の普及に伴いその報告は増加している2,3)。しかし,本疾患にみられる胸痛についてはcor-onary steal4)で説明されているが,十分な検討がなされているとはいい難い。今回われわれは,中年になって前胸部痛で発症した先天性冠動脈肺動脈瘻症例の冠血流量を瘻閉鎖前後で測定し,本疾患にみられる胸痛出現の機序について若干の検討をしたので報告する。
Recently reports of congenital coronary-pulmonary fistula have been increasing with the wide-spread use of coronary angiography. However, the cause of the angina sometimes seen as a chief complaint in coronary fistula has not been well demonstrated although it has been suggested that coronary steal phenomenon accounts for it. This report docu-mented coronary hemodynamics in a patient who came to develop anterior chest pain in the middle age owing to congenital coronary-pulmonary fistula, measuring coronary flow before and after the fistula-closure operation.
A 35-year-old woman suffered from a sudden onset of severe anterior chest pain in April, 1986. Shewas referred to our hospital on suspicion of ruptured aneurysm of Valsalva. Ausculatation disclosed con-tinuous murmur at 3 LSB, but no evidence of rup-tured aneurysm of Valsalva was detected by echo-cardiography nor aortography. Coronary angiogra-phy showed both left and right coronary fistula into the stem of pulmonary artery and otherwis normal angiogram. Great cardiac vein flow (GCVF) measu-red with regional thermodilution method was 25 ml/min at rest (70 bpm) and 30 mlimin during rapid atrial pacing (150 bpm) before the operation, and 30 m//min (78 bpm) and 58 ml/min (150 bpm) after the operation, respectively. Before the surgery, anterior coronary resistance (CRant) was higher than that in normal subjects at rest and remained almost steady during atrial pacing. After the surgery, CRant was still higher at rest but remarkably reduced during pacing of 150 bpm.
These findings suggest that the gradual increase in peripheral coronary resistance for a long time may lead to the inducement of coronary steal in the middle-later age in patients with coronary fistula.

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