A 28-year-old patient has been experiencing abnormal fast heartbeats for the past few days and has been diagnosed with Wolff-Parkinson-White syndrome by their cardiologist. The patient is interested in understanding the anatomy and physiology behind this condition and how it leads to the observed symptoms. They have done some research and learned that WPW syndrome is caused by an extra electrical pathway in the heart. However, they are still unclear about the exact mechanisms that result in the fast heartbeats. Can you explain the role of the accessory pathway in WPW syndrome and how it leads to the abnormal fast heart rhythms, such as supraventricular tachycardia (SVT)? Additionally, the patient has been prescribed medication to control their heart rate and is curious to know how these medications work to slow down their heart rate. Can you explain the mechanism of action of these medications in the context of WPW syndrome?Form three questions, the first consisting of at least four sentences, and then answer how practised.