The onset of symptoms is frequently associated with development of paroxysmal or persistent atrial fibrillation, which occurs in at least 40 percent of patients.
症状の発現は発作性あるいは持続性の心房細動の発生に伴うことが多く、心房細動は少なくとも40％の患者に生じる。
僧帽弁狭窄症-39
The onset of symptoms is frequently associated with development of paroxysmal or persistent atrial fibrillation, which occurs in at least 40 percent of patients.
症状の発現は発作性あるいは持続性の心房細動の発生に伴うことが多く、心房細動は少なくとも40％の患者に生じる。