Which of the following is/are correct? Select all that apply. D ECG-Electrocardi

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Which of the following is/are correct? Select all that apply. D ECG-Electrocardiograph Atrial fbrillation is more serious than ventricular fibrillation since it pumps blood to the ventricles R-Rinterval two full heart cycles Fibrillation is very rapid coordinated myocardial activity QRS complex represents depolarization of the ventricles and repolarization of the atria l If a person pulse is 45 beat/minute, it means the AV node becomes the primary pacemaker Recording of clectrical changes occurring during heart activity riclude the P and T waves representing atrial and ventricular repolarization. respectively D S17 segment + contraction of the ventricles trial fibrillation affects only the P wave which is atrial depolarization

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