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AHA/ACC/HRS SCIENTIFIC STATEMENT

Guidelines for the Standardization and Interpretation of the Electrocardiogram

Part I: The Electrocardiogram and Its Technology

This statement examines the relation of the resting ECG to its technology. Its purpose is to foster understanding of how the modern ECG is derived and displayed and to establish standards that will improve the accuracy and usefulness of the ECG in practice. Derivation of representative waveforms and measurements based on global intervals are described. Special emphasis is placed on digital signal acquisition and computer-based signal processing, which provide automated measurements that lead to computer-generated diagnostic statements. Lead placement, recording methods, and waveform presentation are reviewed. Throughout the statement, recommendations for ECG standards are placed in context of the clinical implications of evolving ECG technology.

Key Words: AHA Scientific Statements • electrocardiography • computers • diagnosis • electrophysiology • intervals • potentials • tests

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