A 62-year-old accountant recently suffered an inferior myocardial infarction for which a stent was placed to his right coronary artery. A week later he is admitted to the hospital with severe fatigue and shortness of breath. On examination, the heart rate is regular at 30 beats per minute. What is the most likely heart rhythm? Atrial fibrillation with slow ventricular response. Complete heart block. Ventricular trigeminy. Sinus arrhythmia. Ventricular tachycardia.