character: Heart
topic: Arrhythmias and Abnormal Electrical Activity
grade: 11
subject: Biology
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character: Electrocardiogram (ECG)
topic: Measuring Heart Rhythms
grade: 11
subject: Biology
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character: Pacemaker Cells
topic: Role in Heart Rhythm Regulation
grade: 11
subject: Biology
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character: Cardiovascular System
topic: Impact of Arrhythmias on Health
grade: 11
subject: Biology
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