まとめ
左心房の大きさは,心房細動の発達と心臓転換の成功に大きな影響を与えます. 左心房の大きさは,心房細動のリスクを高め,心臓転換後の持続性シナプスリズムの可能性を減らす.
科学分野:
- 心臓病学 心臓病学
- 心臓電気生理学 心臓電気生理学
背景:
- 心房細動は,一般的な心律不良です.
- 左心房の拡大は,心房細動の既知の危険因子です.
- 左心房の大きさと心房細動の間の正確な定量的な関係は,まだ完全に解明されていない.
研究 の 目的:
- 左心房の大きさと心房細動の発生率との関係を定量的に定義する.
- 左心房のサイズが,心臓転換の長期的な成功に与える影響を評価する.
主な方法:
- エコカルジオグラフィーは,左心房の大きさを測定するために使用されました.
- この研究には3つの患者グループが参加した:孤立したミトラル弁疾患,孤立した大動脈弁疾患,非対称性隔膜縮症.
- 左心房の寸法と心房細動の発生/心臓転換のアウトカムとの相関が分析されました.
主要な成果:
- 心房細動は,左心房の寸法が<44mmであった場合に稀 (3%) であったが,>40mmであった場合に一般的 (54%) であった.
- 少なくとも6ヶ月間持続したシヌスリズムとして定義される心臓転換の成功は,左心房の寸法が45mmを超えるとありそうではなかった.
- 左心房の大きさの増加と心房細動の罹患率との間に強い相関が観察されました.
結論:
- 左心房の大きさは,心房細動の発症の重要な決定因子です.
- 左心房の大きさは,シヌスリズムを回復させるための心臓転換の長期的な有効性に影響します.
- 左心房膨張につながる慢性血液動力学的負担は,心房細動に予備する病理生理学的メカニズムである可能性が高い.
関連する概念動画
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A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
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01:24Cardiac Catheterization III: Left Heart Catheterization
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