Which of the following represents a potential risk of hypokalemia?

Hypokalemia, which is a lower than normal level of potassium in the bloodstream, is associated with several cardiovascular risks, and one of the most significant concerns is the development of arrhythmias. Adequate potassium levels are crucial for maintaining the electrical stability of the heart. Potassium plays a vital role in cardiac action potentials and muscle contraction. When potassium levels are low, it can lead to disturbances in the heart's electrical conduction system, potentially resulting in arrhythmias, which can manifest as palpitations, tachycardia, or even more severe life-threatening conditions.

Maintaining proper potassium balance is essential not only for cardiac rhythm but also for overall cardiovascular health. The potential for arrhythmias increases as hypokalemia impairs the heart's ability to depolarize and repolarize properly, thereby predisposing individuals to various types of tachyarrhythmias and possibly leading to complications such as atrial fibrillation or ventricular tachycardia.

Regarding the other options, while cardiac relaxation can be indirectly affected by electrolyte imbalances, it is not a direct risk associated with hypokalemia. Increased blood pressure can result from various factors, but it is not a direct risk of hypokalemia itself. Improved cardiac output is unlikely as