ECG Recording and Basic Interpretation资料来源 孙秀成教授 北京大学医疗集团 Electrical signalbegins in the sinoatrial (SA) node: 'naturalpacemaker.' causes the atria to contract. The signal thenpasses through the atrioventricular (AV) node sends the signal to theventricles via the “bundle of His” causes the ventricles to contract.
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