Unexplained Syncope With the λ Pattern in Electrocardiogram:a Case Report / 中国循环杂志

ABSTRACT

The λ pattern is a rare electrocardiogram feature in clinical practice,which often indicates the occurrence of impending fatal ventricular tachyarrhythmias or sudden cardiac death.In this case,Holter monitoring recorded a progressive evolution of the λ pattern followed by advanced atrioventricular blocks in a patient with chest pain accompanied by syncope.λ sign occurred at the time of chest pain,and advanced atrioventricular blocks were recorded at the time of subsequent syncope.Coronary stenosis was detected in the left circumflex by coronary angiography.The patient recovered after stent implantation in the culprit vessel and related medications to prevent coronary spasm.Our case indicate that the λ pattern could occur prior advanced atrioventricular blocks-induced syncope in patient with ischemic heart disease.