Which intervention is inappropriate for a patient with a history of syncope and suspected preexcitation syndromes?

In the context of a patient who has a history of syncope and is suspected of having preexcitation syndromes, the use of calcium channel blockers is inappropriate because these medications can lead to a potentially dangerous situation in patients with these syndromes. Preexcitation syndromes, such as Wolff-Parkinson-White syndrome, can result in rapid ventricular rates due to a reentry circuit involving the accessory pathway. Calcium channel blockers can further facilitate conduction through these pathways, potentially exacerbating tachycardia or even leading to a life-threatening arrhythmia.

In contrast, options like radiofrequency catheter ablation would actually address the underlying issue by ablating the accessory pathway responsible for the preexcitation, thus reducing the risk of arrhythmias and syncope. Similarly, digoxin, while not usually a first-line treatment, can be used carefully in certain cases of atrial fibrillation with preexcitation, though caution is advised due to the same concerns about enhancing conduction through the accessory pathway. Lastly, percutaneous coronary intervention is unrelated to the management of syncope due to preexcitation syndrome and is typically focused on coronary artery disease rather than arrhythmias. Hence, while the other interventions have their place in arrhythmia management or other