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默沙东 诊疗手册

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Tracing the Heart's Electrical Pathway
Tracing the Heart's Electrical Pathway
Tracing the Heart's Electrical Pathway

窦房结 (1) 发出的电冲动通过右心房和左心房,(2) 引起心房收缩。当电冲动到达房室结 (3) 时被轻度延迟。随后下传到希氏束 (4),希氏束分支出进入右室的右束支 (5) 和进入左室的左束支 (5)。电冲动随后扩散入心室,引起心室收缩。