Klein G J, Gulamhusein S S
Stroke. 1982 Nov-Dec;13(6):746-9. doi: 10.1161/01.str.13.6.746.
Patients with recurrent, unheralded syncope are often suspected of having intermittent cardiac bradyarrhythmias or tachyarrhythmias. However, syncopal episodes may be infrequent and investigations may yield few or non-specific etiological clues. Therapy may be entirely empirical (pacing or antiarrhythmic drugs) or guided by an abnormality detected that suggests a particular diagnosis. Intracardiac electrophysiological studies may detect conduction abnormalities or provoke arrhythmias but the relationship between these findings and clinical symptoms may be difficult to establish. The recording of the ECG during syncope by repeated ambulatory monitoring or other methods remains the only unequivocal diagnostic technique to establish an arrhythmic etiology.
反复出现不明原因晕厥的患者常被怀疑患有间歇性心脏缓慢性心律失常或快速性心律失常。然而，晕厥发作可能并不频繁，检查可能只能提供很少的病因线索或非特异性病因线索。治疗可能完全是经验性的（起搏或抗心律失常药物），或者由检测到的提示特定诊断的异常情况来指导。心内电生理研究可能检测到传导异常或诱发心律失常，但这些发现与临床症状之间的关系可能难以确定。通过反复动态监测或其他方法在晕厥期间记录心电图仍然是确定心律失常病因的唯一明确诊断技术。
