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For patients suffering from bradycardia because of lack of oxygen during sleep apnea episodes, the CPAP (Continuous Positive Airway Pressure) machine can stop the episodes.Patients wear a mask hooked to a machine that supplies oxygen and opens the airways. The amount of oxygen supplied varies by the user's needs.
A moderate increase in serum magnesium can lead to a mild decrease in blood pressure, and a greater concentration may cause severe symptomatic hypotension. Magnesium is also cardiotoxic and, in high concentrations, can cause bradycardia. Occasionally, complete heart block and cardiac arrest may occur at levels greater than 7 mmol/L. Hypocalcemia