28. The nurse is monitoring the cardiac thythms of patients

28. The nurse is monitoring the cardiac thythms of patients in the coronary care unit. Which patient will need immediate intervention? 1. Patient admitted with heart failure who has atrial fibrillation with a rate of 88 beats/min while at rest 2. Patient with a newly implanted demand ventricular pacemaker who has occasional periods of sinus rhythm at a rate of 90 to 100 beats/min 3. Patient who has had an acute myocardial infarction and has sinus rhythm at a rate of 76 beats/min with frequent premature ventricular contractions 4. Patient who recently started taking atenolol and has a first-degree heart block, with a rate of 58 beats/min

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