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An 81-year-old man presents to the emergency department with central, crushing chest pain. His ECG shows ST-segment elevation in leads V1-4.Which electrical state in the heart is likely to be affected according to his ECG?Atrial depolarisationThe time between the onset of atrial depolarisation and the onset of ventricular depolarisationThe start of ventricular depolarisationThe period when the entire ventricle is depolarisedThere is no link between the electrical state of the heart and the ST segment of the ECG13%

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